章节-知识点推题

{"code":2000000,"msg":"OK","data":[{"id":"3181559734067200","course_id":14,"type_id":"1411","kpoint_ids":[200,203,47],"catalog_ids":[4612,4696,4745,4792,4828,4901,4953,5002,38564],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">阅读下列材料。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">石墨烯是由碳原子构成的一层或几层原子厚度的晶体，其层内微观结构如图</span><span style=\"font-family: 'Times New Roman';\">1.</span><span style=\"font-family: 宋体;\">石墨烯具有高透光性、高强度、高导热性和生物相容性等特点，在电子、复合材料、医疗健康等多领域具有广泛应用，不同领域的应用分布如图</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">纺织领域是石墨烯应用的新兴领域。纺织面料掺入石墨烯后具有保暖、抗菌等优点。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">石墨烯面料的保暖原理主要是利用远红外线升温，改善人体微循环系统，促进新陈代谢。在低温情况下，石墨烯可将来自远红外线的热量传送给人体，相较于普通纺织面料，石墨烯面料的“主动产热”更受人们青睐。石墨烯面料的抗菌性能与其结构有关。掺入面料的石墨烯片层结构中含有丰富的含氧基团，影响菌体的正常代谢，从而使菌体无法吸收养分直至死亡。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">实验人员研究不同面料中掺加石墨烯后的抗菌效果。取氨纶混纺纱、石墨烯-氨纶混纺纱、棉混纺纱、石墨烯</span><span style=\"font-family: 'Times New Roman';\">-</span><span style=\"font-family: 宋体;\">棉混纺纱四种面料样品，测得其他条件相同时，四种面料对大肠杆菌等三种</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">菌体的抑菌率结果如图</span><span style=\"font-family: 'Times New Roman';\">3.</span><span style=\"font-family: 宋体;\">图中，抑菌率越高，表明抗菌性能越强。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">随着科技水平的提升，石墨烯做为一种基本材料，其应用会有越来越多的可能，工业上可采用甲烷在</span><span style=\"font-family: 'Times New Roman';\">Cu</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">Pd</span><span style=\"font-family: 宋体;\">作催化剂、温度在</span><span style=\"font-family: 'Times New Roman';\">1000℃</span><span style=\"font-family: 宋体;\">分解制取石墨烯，同时产生氢气。</span></p><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/680d730b-764d-40bb-ba2d-188d87588b80.png\" width=\"497\" height=\"180\" /></p><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/5c02c4c9-3bdf-4f94-9ed8-84eec75e1d41.png\" width=\"504\" height=\"254\" /></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">依据文章回答下列问题。</span></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">写出石墨烯具有的物理性质</span><span class=\"qml-bk\" index=\"1\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">（写一条即可）。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">由图</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">可知，石墨烯应用占比最高的领域是</span><span class=\"qml-bk\" index=\"2\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（3）</span><span style=\"font-family: 宋体;\">工业上用甲烷分解制取石墨烯的化学方程式</span><span class=\"qml-bk\" index=\"3\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（4）</span><span style=\"font-family: 宋体;\">下列说法正确是</span><span style=\"font-family: 'Times New Roman';\">___________</span><span style=\"font-family: 宋体;\">。</span><div class=\" qml-og\"><table class=\"qml-og\" style=\"width:100%\"><tr><td>A.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">石墨烯可以利用远红外线为人体供暖</span></span></td></tr><tr><td>B.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">面料的抑菌率与面料种类、菌体种类均有关</span></span></td></tr><tr><td colspan=\"1\">C.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">抑菌率越高，表明抗菌性能越弱</span></span></td></tr></table></div></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（5）</span><span style=\"font-family: 宋体;\">根据图</span><span style=\"font-family: 'Times New Roman';\">3</span><span style=\"font-family: 宋体;\">可推断“石墨烯</span><span style=\"font-family: 'Times New Roman';\">-</span><span style=\"font-family: 宋体;\">棉混纺纱面料的抗菌性能比棉混纺纱面料”</span><span class=\"qml-bk\" index=\"4\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">（填“强”或“弱”），依据是</span><span class=\"qml-bk\" index=\"5\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 宋体;\">导热性（透光性、强度高）</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  qml-exact\"><span style=\"font-family: 宋体;\">电子领域</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（3）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><img  src=\"https://img.xkw.com/dksih/formula/424ac56a7a8bf940bcaa0504415ef028.svg\" class=\"xkw-math-img\" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（4）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an qml-isop \">AB</span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（5）<span class=\"qml-an-sq\" id-container=\"question\">&nbsp;&nbsp;&nbsp;&nbsp;①. <span class=\"qml-an  qml-exact\"><span style=\"font-family: 宋体;\">强</span></span>&nbsp;&nbsp;&nbsp;&nbsp;②. <span class=\"qml-an  \"><span style=\"font-family: 宋体;\">菌体种类相同时，石墨烯</span><span style=\"font-family: 'Times New Roman';\">-</span><span style=\"font-family: 宋体;\">棉混纺纱面料的抑菌率均高于棉混纺纱面料</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"\"><span>由材料可知，石墨烯具有高透光性、高强度、高导热性和生物相容性等物理性质。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"\"><span>图 2 可知，石墨烯在电子领域的占比为27%，是应用占比最高的领域，故填电子领域。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(3)小问详解： <p style=\"\"><span><span>工业上可采用甲烷在Cu、Pd作催化剂、温度在1000℃分解制取石墨烯，同时产生氢气，反应的化学方程式为</span><img src=\"https://img.xkw.com/dksih/formula/94dd5f5ad4ff00a4ddeceb1925112ee0.svg\" class=\"xkw-math-img\"/><span>。</span></span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(4)小问详解： <p style=\"\"><span>A、在低温情况下，石墨烯可将来自远红外线的热量传送给人体，故正确；</span></p><p style=\"\"><span>B、由图3可知，面料的抑菌率与面料种类、菌体种类均有关，故正确；</span></p><p style=\"\"><span>C、由材料可知，抑菌率越高，表明抗菌性能越强，故不正确。</span></p><p style=\"\"><span>故选AB。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(5)小问详解： <p style=\"\"><span>由题文中的图3可知，菌体种类相同时，石墨烯-棉混纺纱面料的抑菌率均高于棉混纺纱面料，即石墨烯 - 棉混纺纱面料的抗菌性能优于棉混纺纱面料，故填：菌体种类相同时，石墨烯-棉混纺纱面料的抑菌率均高于棉混纺纱面料。</span></p></div></div>","create_date":"2023-02-24 11:22:45","paper_type_ids":[5,3],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4612,"name":"第一节 碳的单质"},{"id":4696,"name":"第3节 化学方程式的书写与应用"},{"id":4745,"name":"5.2 组成燃料的主要元素——碳"},{"id":4792,"name":"4.2 碳"},{"id":4828,"name":"第二节 化学反应的表示"},{"id":4901,"name":"第二节 化石燃料的利用"},{"id":4953,"name":"课题1 金刚石、石墨和C60"},{"id":5002,"name":"课题1 金刚石、石墨和C60"},{"id":38564,"name":"综合复习与测试"}],"type":{"id":"1411","name":"科普阅读题"},"kpoints":[{"id":200,"name":"石墨的相关知识"},{"id":203,"name":"根据新信息判断碳单质的性质"},{"id":47,"name":"化学方程式的书写"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"530125","name":"宜良县"},"title":"云南省昆明市宜良县2022-2023学年九年级上学期期末化学试题"}]},{"id":"3181503124815872","course_id":14,"type_id":"1404","kpoint_ids":[47,254,255,263],"catalog_ids":[5012,4753,4917,4711,4860,4962,4799,4621,5068],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">回答下列问题。</span></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">《吕氏春秋》记载“金柔锡柔，合两柔则刚”（注：金指钢单质，锡指锡单质，刚指坚硬）。这句话说明铜锡合金相较于铜、锡的特点是什么？</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">某同学在</span><span style=\"font-family: 'Times New Roman';\">Ca</span><span style=\"font-family: 宋体;\">（</span><span style=\"font-family: 'Times New Roman';\">NO</span><span style=\"font-family: 'Times New Roman';\"><sub>3</sub></span><span style=\"font-family: 宋体;\">）</span><span style=\"font-family: 'Times New Roman';\"><sub>2</sub></span><span style=\"font-family: 宋体;\">和</span><span style=\"font-family: 'Times New Roman';\">AgNO</span><span style=\"font-family: 'Times New Roman';\"><sub>3</sub></span><span style=\"font-family: 宋体;\">的混合溶液中加入一定质量的锌粉。充分反应后过滤发现滤液仍是蓝色。请写出</span><span style=\"font-family: 'Times New Roman';\">Zn</span><span style=\"font-family: 宋体;\">与</span><span style=\"font-family: 'Times New Roman';\">AgNO</span><span style=\"font-family: 'Times New Roman';\"><sub>3</sub></span><span style=\"font-family: 宋体;\">溶液反应的化学方程式。</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 宋体;\">硬度大</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><img  src=\"https://img.xkw.com/dksih/formula/0a1b0c757735643bbd866a8f0bb0abaf.svg\" class=\"xkw-math-img\" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"\"><span>《吕氏春秋》记载“金柔锡柔，合两柔则刚”（注：金指钢单质，锡指锡单质，刚指坚硬）。这句话说明铜锡合金相较于铜、锡硬度大的特点；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"\"><span><span>锌与硝酸银反应生成硝酸锌和银，该反应方程式为</span><img src=\"https://img.xkw.com/dksih/formula/3d019249c01781397a259cb32d86d01f.svg\" class=\"xkw-math-img\"/><span>。</span></span></p></div></div>","create_date":"2023-02-24 09:27:35","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":5012,"name":"课题2 金属的化学性质"},{"id":4753,"name":"6.1 金属材料的物理特性"},{"id":4917,"name":"第二节 金属的化学性质"},{"id":4711,"name":"第2节 常见的酸和碱"},{"id":4860,"name":"第二节 金属的化学性质"},{"id":4962,"name":"课题2 金属的化学性质"},{"id":4799,"name":"6.1 奇光异彩的金属"},{"id":4621,"name":"第二节 金属的化学性质"},{"id":5068,"name":"单元2 金属的性质"}],"type":{"id":"1404","name":"简答题"},"kpoints":[{"id":47,"name":"化学方程式的书写"},{"id":254,"name":"合金的认识"},{"id":255,"name":"常见合金"},{"id":263,"name":"金属与盐溶液反应"}],"media":0,"answer_scoreable":0,"tag_ids":[4801],"tags":[{"id":4801,"name":"典型例题"}],"source_papers":[{"area":{"id":"410181","name":"巩义市"},"title":"河南省郑州市巩义市2022-2023学年九年级上学期期末化学试题"}]},{"id":"3180844542836736","course_id":14,"type_id":"1402","kpoint_ids":[47,82,52480,533],"catalog_ids":[4999,4772,4928,4722,4873,4950,4787,4634,38567],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">水是人类宝贵的自然资源，在生产、生活中有着重要的应用。</span></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">下列有关保护水资源的说法正确的是</span><span style=\"font-family: 'Times New Roman';\">______</span><span style=\"font-family: 宋体;\">（填序号）。</span><div class=\" qml-og\"><table class=\"qml-og\" style=\"width:100%\"><tr><td>A.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">生活污水可直接排放</span></span></td></tr><tr><td>B.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">工业上对污染的水体作处理使之符合排放标准后再排放</span></span></td></tr><tr><td colspan=\"1\">C.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">农药、化肥的施用会造成水体污染，应该禁止施用</span></span></td></tr></table></div></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">使用硬水会给生活和生产带来许多麻烦，生活上常用</span><span class=\"qml-bk\" index=\"1\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">的方法来降低水的硬度。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（3）</span><span style=\"font-family: 'Times New Roman';\">18</span><span style=\"font-family: 宋体;\">世纪末，人们通过水的分解实验研究，才最水终认识了水的组成。如图是某学习小组同学完成电解水实验的装置示意图，该反应的化学方程式为</span><span class=\"qml-bk\" index=\"2\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/691b2052-ac92-4b2f-b262-406838eb2713.png\" width=\"126\" height=\"153\" /></p></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（4）</span><span style=\"font-family: 宋体;\">电解水的过程可用下图表示，微观粒子运动变化的先后顺序是</span><span style=\"font-family: 'Times New Roman';\">______</span><span style=\"font-family: 宋体;\">（填序号）。</span><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/987d764b-f0ca-466c-bf5b-4e97fd628ec3.png\" width=\"317\" height=\"111\" /></p><div class=\" qml-og\"><table class=\"qml-og\" style=\"width:100%\"><tr><td>A.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">①②③</span></span></td><td>B.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">②①③</span></span></td><td colspan=\"1\">C.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">①③②</span></span></td></tr></table></div></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an qml-isop \">B</span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 宋体;\">加热煮沸</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（3）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><img  src=\"https://img.xkw.com/dksih/formula/87856c6a876cc59f2d377922e0020f5d.svg\" class=\"xkw-math-img\" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（4）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an qml-isop \">C</span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">A</span><span style=\"font-family: 宋体;\">、生活污水直接排放，会污染水资源，故</span><span style=\"font-family: 'Times New Roman';\">A </span><span style=\"font-family: 宋体;\">不符合题意；</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">B</span><span style=\"font-family: 宋体;\">、工业上对污染的水体作处理使之符合排放标准后再排放，能保护水资源，故</span><span style=\"font-family: 'Times New Roman';\">B</span><span style=\"font-family: 宋体;\">符合题意；</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">、农药、化肥的施用会造成水体污染，应合理施用，不应该禁止施用，故</span><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">不符合题意。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">故填：</span><span style=\"font-family: 'Times New Roman';\">B</span><span style=\"font-family: 宋体;\">。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">使用硬水会给生活和生产带来许多麻烦，生活上常用加热煮沸的方法来降低水的硬度，故填：加热煮沸。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(3)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">电解水实验中，水在通电条件下分解生成氢气和氧气，反应的化学方程式为：</span><img  src=\"https://img.xkw.com/dksih/formula/87856c6a876cc59f2d377922e0020f5d.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 'Times New Roman';\"> </span><span style=\"font-family: 宋体;\">，故填：</span><img  src=\"https://img.xkw.com/dksih/formula/87856c6a876cc59f2d377922e0020f5d.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 宋体;\">。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(4)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">化学变化中，分子分成原子，原子重新结合成分子，电解水的过程中，水分子分成氢原子和氧原子，氢原子和氢原子结合成氢分子，氧原子和氧原子结合成氧分子，则微观粒子运动变化的先后顺序是①③②，故填：</span><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">。</span></p></div></div>","create_date":"2023-02-23 11:07:42","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4999,"name":"课题2 如何正确书写化学方程式"},{"id":4772,"name":"9.4 化学物质与健康"},{"id":4928,"name":"第四节 化学与环境保护"},{"id":4722,"name":"第3节 环境污染的防治"},{"id":4873,"name":"第四节 化学与环境保护"},{"id":4950,"name":"课题2 如何正确书写化学方程式"},{"id":4787,"name":"3.1 水"},{"id":4634,"name":"第三节 化学与环境"},{"id":38567,"name":"专题复习与测试"}],"type":{"id":"1402","name":"填空题"},"kpoints":[{"id":47,"name":"化学方程式的书写"},{"id":82,"name":"微粒图像的分析及应用"},{"id":52480,"name":"硬水的危害及软化方法"},{"id":533,"name":"水体的污染及保护"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"120113","name":"北辰区"},"title":"天津市北辰区2022-2023学年九年级上学期期末化学试题"}]},{"id":"3181216544555008","course_id":14,"type_id":"1403","kpoint_ids":[47,190,214,189],"catalog_ids":[4696,38564,5003,4751,4902,4836,4954,4793,4614],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">根据下列实验装置图，回答有关问题。</span></p><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/c93f5646-a8b9-48b0-8e78-ddf2f7d1743a.png\" width=\"646\" height=\"195\" /></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">写出装置图中标号仪器的名称：①</span><span class=\"qml-bk\" index=\"1\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">实验室用高锰酸钾制取氧气的化学方程式为</span><span class=\"qml-bk\" index=\"2\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">；选用</span><span style=\"font-family: 'Times New Roman';\">AF</span><span style=\"font-family: 宋体;\">装置制取氧气结束时，为防止水槽里的水倒流，应采取的操作是</span><span class=\"qml-bk\" index=\"3\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（3）</span><span style=\"font-family: 宋体;\">若用</span><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">分解可制取</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">，实验室通过测定收集一定体积</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">所用的时间，来研究不同条件对</span><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">分解速率的影响。</span><table style=\"width:504px;border-width:0px 0px 0px 0px;border-style:solid;border-color:black;border-collapse: collapse;\"><tr  height=\"20px\"><td style=\"width:46px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 宋体;\">实验</span></p></td><td style=\"width:66px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 宋体;\">温度</span><span style=\"font-family: 'Times New Roman';\">/℃</span></p></td><td style=\"width:117px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">溶液浓度</span></p></td><td style=\"width:141px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">溶液体积</span><span style=\"font-family: 'Times New Roman';\">/mL</span></p></td><td style=\"width:78px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">lg</span><span style=\"font-family: 宋体;\">催化剂</span></p></td><td style=\"width:56px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 宋体;\">时间</span><span style=\"font-family: 'Times New Roman';\">/s</span></p></td></tr><tr  height=\"20px\"><td style=\"width:47px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">1</span></p></td><td style=\"width:68px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">20</span></p></td><td style=\"width:99px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">5%</span></p></td><td style=\"width:114px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">40</span></p></td><td style=\"width:86px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 宋体;\">二氧化锰</span></p></td><td style=\"width:57px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">37</span></p></td></tr><tr  height=\"20px\"><td style=\"width:47px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">2</span></p></td><td style=\"width:68px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">20</span></p></td><td style=\"width:98px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">10%</span></p></td><td style=\"width:112px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">40</span></p></td><td style=\"width:90px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 宋体;\">二氧化锰</span></p></td><td style=\"width:58px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">14</span></p></td></tr><tr  height=\"20px\"><td style=\"width:48px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">3</span></p></td><td style=\"width:68px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">20</span></p></td><td style=\"width:99px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">a</span></p></td><td style=\"width:113px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">40</span></p></td><td style=\"width:86px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 宋体;\">氧化铜</span></p></td><td style=\"width:59px;vertical-align:center;border-width:1px;border-style:solid;border-color:black;\"><p style=\"text-align: center;\"><span style=\"font-family: 'Times New Roman';\">b</span></p></td></tr></table><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">①上表中实验</span><span style=\"font-family: 'Times New Roman';\">1</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">探究</span><span class=\"qml-bk\" index=\"4\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">对分解速率的影响，实验</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">3</span><span style=\"font-family: 宋体;\">探究不同催化剂对分解速率的影响，则浓度</span><span style=\"font-family: 'Times New Roman';\">a</span><span style=\"font-family: 宋体;\">为</span><span class=\"qml-bk\" index=\"5\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">②</span><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">分解可制取</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">，该小组在反应开始后立即连接装置</span><span style=\"font-family: 'Times New Roman';\">G</span><span style=\"font-family: 宋体;\">（注：</span><span style=\"font-family: 'Times New Roman';\">G</span><span style=\"font-family: 宋体;\">图中的集气瓶上方有少量空气）中的导管口，从而测定收集一定体积</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">所用的时间。你认为该做法</span><span class=\"qml-bk\" index=\"6\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">（填：“是”与“否”）合理。说出你的观点并闻述理由：</span><span class=\"qml-bk\" index=\"7\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></p></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（4）</span><span style=\"font-family: 宋体;\">实验室用大理石和稀盐酸制取二氧化碳的化学方程式为</span><span class=\"qml-bk\" index=\"8\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">；若用碳酸钠粉末和稀盐酸反应来制取二氧化碳，为了得到平稳的气流，应选用的发生装置是</span><span class=\"qml-bk\" index=\"9\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（5）</span><span style=\"font-family: 宋体;\">某兴趣小组用</span><span style=\"font-family: 'Times New Roman';\">D</span><span style=\"font-family: 宋体;\">装置制取二氧化碳时，用压强传感器测得试管内某段时间压强的变化如图所示，下列说法正确的是</span><span style=\"font-family: 'Times New Roman';\">______</span><span style=\"font-family: 宋体;\">（填字母）。</span><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/20b19746-05f5-4783-a239-9d44f60f3f8d.png\" width=\"207\" height=\"162\" /></p><div class=\" qml-og\"><table class=\"qml-og\" style=\"width:100%\"><tr><td>A.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 'Times New Roman';\">a</span><span style=\"font-family: 宋体;\">点对应的操作是关闭弹簧夹</span></span></td><td>B.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 'Times New Roman';\">ab</span><span style=\"font-family: 宋体;\">段试管中液面逐渐上升</span></span></td></tr><tr><td>C.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 'Times New Roman';\">bc</span><span style=\"font-family: 宋体;\">段大理石与稀盐酸脱离接触</span></span></td><td colspan=\"1\">D.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 'Times New Roman';\">c</span><span style=\"font-family: 宋体;\">点的对应操作是打开弹簧夹</span></span></td></tr></table></div></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 宋体;\">铁架台、长颈漏斗</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\">&nbsp;&nbsp;&nbsp;&nbsp;①. <span class=\"qml-an  \"><img  src=\"https://img.xkw.com/dksih/formula/cb5cbe683def60e207a641cb286b7a83.svg\" class=\"xkw-math-img\" /></span>&nbsp;&nbsp;&nbsp;&nbsp;②. <span class=\"qml-an  \"><span style=\"font-family: 宋体;\">先取出水中的导管，再熄灭酒精灯</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（3）<span class=\"qml-an-sq\" id-container=\"question\">&nbsp;&nbsp;&nbsp;&nbsp;①. <span class=\"qml-an  \"><span style=\"font-family: 宋体;\">过氧化氢溶液浓度</span></span>&nbsp;&nbsp;&nbsp;&nbsp;②. <span class=\"qml-an  qml-exact\"><span style=\"font-family: 'Times New Roman';\">10%</span></span>&nbsp;&nbsp;&nbsp;&nbsp;③. <span class=\"qml-an  qml-exact\"><span style=\"font-family: 宋体;\">否</span></span>&nbsp;&nbsp;&nbsp;&nbsp;④. <span class=\"qml-an  \"><span style=\"font-family: 宋体;\">集气瓶上方有空气，反应刚开始从导管排出的气体中也含有空气</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（4）<span class=\"qml-an-sq\" id-container=\"question\">&nbsp;&nbsp;&nbsp;&nbsp;①. <span class=\"qml-an  \"><img  src=\"https://img.xkw.com/dksih/formula/99b2e69a7dc417bdf51eb5abb5bf72e1.svg\" class=\"xkw-math-img\" /></span>&nbsp;&nbsp;&nbsp;&nbsp;②. <span class=\"qml-an  qml-exact\"><span style=\"font-family: 'Times New Roman';\">C</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（5）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an qml-isop \">ACD</span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">装置图中标号</span><span style=\"font-family: 'Times New Roman';\">①</span><span style=\"font-family: 宋体;\">仪器的名称是铁架台，标号</span><span style=\"font-family: 'Times New Roman';\">②</span><span style=\"font-family: 宋体;\">仪器的名称是长颈漏斗，故填：铁架台、长颈漏斗。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">①</span><span style=\"font-family: 宋体;\">高锰酸钾在加热条件下分解生成锰酸钾、二氧化锰和氧气，反应的化学方程式为：</span><img  src=\"https://img.xkw.com/dksih/formula/cb5cbe683def60e207a641cb286b7a83.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 'Times New Roman';\"> </span><span style=\"font-family: 宋体;\">，故填：</span><img  src=\"https://img.xkw.com/dksih/formula/cb5cbe683def60e207a641cb286b7a83.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 宋体;\">。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">②</span><span style=\"font-family: 宋体;\">用排水法收集氧气结束时，为防止水槽里的水倒流，应采取的操作是先取出水中的导管，再熄灭酒精灯，故填：先取出水中的导管，再熄灭酒精灯。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(3)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">分析表中设计的变量，实验</span><span style=\"font-family: 'Times New Roman';\">1</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">中只有过氧化氢溶液浓度不同，则实验</span><span style=\"font-family: 'Times New Roman';\">1</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">就是探究过氧化氢溶液浓度对分解速率的影响，实验</span><span style=\"font-family: 'Times New Roman';\">2</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">3</span><span style=\"font-family: 宋体;\">是探究不同催化剂对分解速率的影响，除催化剂不同外其他变量均相同，则浓度</span><span style=\"font-family: 'Times New Roman';\">a</span><span style=\"font-family: 宋体;\">为</span><span style=\"font-family: 'Times New Roman';\">10%</span><span style=\"font-family: 宋体;\">，故</span><span style=\"font-family: 'Times New Roman';\">①</span><span style=\"font-family: 宋体;\">填：氧化氢溶液浓度，</span><span style=\"font-family: 'Times New Roman';\">②</span><span style=\"font-family: 宋体;\">填：</span><span style=\"font-family: 'Times New Roman';\">10%</span><span style=\"font-family: 宋体;\">。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">分解可制取</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">，该小组在反应开始后立即连接装置</span><span style=\"font-family: 'Times New Roman';\">G</span><span style=\"font-family: 宋体;\">（注：</span><span style=\"font-family: 'Times New Roman';\">G</span><span style=\"font-family: 宋体;\">图中的集气瓶上方有少量空气）中的导管口，从而测定收集一定体积</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">所用的时间，该做法不合理，因为</span><span style=\"font-family: 'Times New Roman';\">G</span><span style=\"font-family: 宋体;\">图中的集气瓶上方有空气，反应刚开始从导管排出的气体中也含有空气，故</span><span style=\"font-family: 'Times New Roman';\">③</span><span style=\"font-family: 宋体;\">填：否，</span><span style=\"font-family: 'Times New Roman';\">④</span><span style=\"font-family: 宋体;\">填：集气瓶上方有空气，反应刚开始从导管排出的气体中也含有空气。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(4)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">①</span><span style=\"font-family: 宋体;\">大理石的主要成分碳酸钙和盐酸反应生成氯化钙、水和二氧化碳，反应的化学方程式为：</span><img  src=\"https://img.xkw.com/dksih/formula/99b2e69a7dc417bdf51eb5abb5bf72e1.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 宋体;\">，故填：</span><img  src=\"https://img.xkw.com/dksih/formula/99b2e69a7dc417bdf51eb5abb5bf72e1.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 宋体;\">。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">②</span><span style=\"font-family: 宋体;\">若用碳酸钠粉末和稀盐酸反应来制取二氧化碳，反应剧烈，为了得到平稳的气流，应选用的发生装置</span><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">，通过注射器控制加入液体的量，来控制反应速率，故填：</span><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(5)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">A</span><span style=\"font-family: 宋体;\">、由图知，</span><span style=\"font-family: 'Times New Roman';\">a</span><span style=\"font-family: 宋体;\">点开始试管内的压强逐渐增大，是由于生成的二氧化碳气体不能顺利排出导致的，所以</span><span style=\"font-family: 'Times New Roman';\">a</span><span style=\"font-family: 宋体;\">点对应的操作是关闭弹簧夹，故</span><span style=\"font-family: 'Times New Roman';\">A</span><span style=\"font-family: 宋体;\">符合题意；</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">B</span><span style=\"font-family: 宋体;\">、由图知，</span><span style=\"font-family: 'Times New Roman';\">ab</span><span style=\"font-family: 宋体;\">段试管内的压强逐渐增大，气体逐渐增多，试管内的液体会被压入长颈漏斗，使试管中液面逐渐降低，故</span><span style=\"font-family: 'Times New Roman';\">B</span><span style=\"font-family: 宋体;\">不符合题意；</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">、由图知，</span><span style=\"font-family: 'Times New Roman';\">bc</span><span style=\"font-family: 宋体;\">段试管内的压强不变，说明试管内气体不再增多，即大理石与稀盐酸脱离接触，故</span><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">符合题意；</span></p><p style=\"text-align: left;\"><span style=\"font-family: 'Times New Roman';\">D</span><span style=\"font-family: 宋体;\">、由图知，</span><span style=\"font-family: 'Times New Roman';\">c</span><span style=\"font-family: 宋体;\">点开始试管内的压强逐渐减小，说明试管内气体能顺利排出，即对应操作是打开弹簧夹，故</span><span style=\"font-family: 'Times New Roman';\">D</span><span style=\"font-family: 宋体;\">符合题意。</span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">故填：</span><span style=\"font-family: 'Times New Roman';\">ACD</span><span style=\"font-family: 宋体;\">。</span></p></div></div>","create_date":"2023-02-23 23:44:32","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4696,"name":"第3节 化学方程式的书写与应用"},{"id":38564,"name":"综合复习与测试"},{"id":5003,"name":"课题2 二氧化碳制取的研究"},{"id":4751,"name":"实验三 二氧化碳实验室制取与性质"},{"id":4902,"name":"第三节 大自然中的二氧化碳"},{"id":4836,"name":"到实验室去：二氧化碳的实验室制取与性质"},{"id":4954,"name":"课题2 二氧化碳制取的研究"},{"id":4793,"name":"4.3 二氧化碳的实验室制法"},{"id":4614,"name":"第三节 二氧化碳的实验室制法"}],"type":{"id":"1403","name":"实验题"},"kpoints":[{"id":47,"name":"化学方程式的书写"},{"id":190,"name":"高锰酸钾制取氧气实验"},{"id":214,"name":"制取二氧化碳的原理"},{"id":189,"name":"过氧化氢制取氧气实验"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"440113","name":"番禺区"},"title":"广东省广州市番禺区2022-2023学年九年级上学期期末化学试题"}]},{"id":"3180831116894208","course_id":14,"type_id":"1409","kpoint_ids":[360,39,58],"catalog_ids":[4617,4705,4741,4788,4840,4897,4967,5018,5050],"years":[2022],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">实验室用</span><span style=\"font-family: 'Times New Roman';\"><span>68gH</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">溶液和</span><span style=\"font-family: 'Times New Roman';\"><span>2gMnO</span><sub>2</sub></span><span style=\"font-family: 宋体;\">混合后制取</span><span style=\"font-family: 'Times New Roman';\"><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">，实验中非气态物质的总质量随时间变化如图所示。</span></p><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/466f0479-97c2-4fef-b9c4-4b1008069d79.png\" width=\"152\" height=\"143\" /></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">反应中</span><span style=\"font-family: 'Times New Roman';\"><span>MnO</span><sub>2</sub></span><span style=\"font-family: 宋体;\">起</span><span class=\"qml-bk\" index=\"1\" size=\"10\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　</span><span style=\"font-family: 宋体;\">作用。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">根据化学方程式计算</span><span style=\"font-family: 'Times New Roman';\"><span>H</span><sub>2</sub><span>O</span><sub>2</sub></span><span style=\"font-family: 宋体;\">溶液中溶质的质量分数。</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  qml-exact\"><span style=\"font-family: 宋体;\">催化</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 宋体;\">解：根据质量守恒定律可知，化学反应前后物质总质量不变，所以该反应中生成氧气的质量为</span><img  src=\"https://img.xkw.com/dksih/formula/996d1a72efac04c2f07ce45a35374666.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 'Times New Roman';\"> </span><span style=\"font-family: 宋体;\">。</span><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">设生成</span><span style=\"font-family: 'Times New Roman';\">3.2g</span><span style=\"font-family: 宋体;\">的氧气需要的过氧化氢质量为</span><span style=\"font-style: italic;font-family: 'Times New Roman';\">x</span></p><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/formula/579896329f0dc025b152a06bb512f408.svg\" class=\"xkw-math-img\" /></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">则该过氧化氢溶液中溶质质量分数为</span><img  src=\"https://img.xkw.com/dksih/formula/3e756389dc517c83c91cf422e16334d7.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 'Times New Roman';\"> </span></p><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">答：该过氧化氢溶液中溶质质量分数为</span><span style=\"font-family: 'Times New Roman';\">10%</span><span style=\"font-family: 宋体;\">。</span></p></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">过氧化氢在二氧化锰做催化剂条件下分解生成水和氧气，其中二氧化锰作催化剂，起催化作用，故填催化；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">见答案。</span></p></div></div>","create_date":"2023-02-23 10:40:23","paper_type_ids":[29],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4617,"name":"第二节 溶液组成的定量表示"},{"id":4705,"name":"第2节 溶液组成的表示"},{"id":4741,"name":"4.3 质量守恒定律"},{"id":4788,"name":"3.2 溶液"},{"id":4840,"name":"第二节 溶液组成的定量表示"},{"id":4897,"name":"第三节 化学反应中的有关计算"},{"id":4967,"name":"课题3 溶液的浓度"},{"id":5018,"name":"课题3 溶液的浓度"},{"id":5050,"name":"单元2 质量守恒定律"}],"type":{"id":"1409","name":"计算题"},"kpoints":[{"id":360,"name":"溶质质量分数结合化学方程式的计算"},{"id":39,"name":"有关质量守恒定律的计算"},{"id":58,"name":"不含杂质的化学方程式计算"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"610113","name":"雁塔区"},"title":"2022年陕西省西安市陕西师范大学附中中考第八次适应性训练化学试题"}]},{"id":"3181209119809536","course_id":14,"type_id":"1409","kpoint_ids":[214,39,361],"catalog_ids":[4751,4793,4617,4705,4840,4967,5018,4912,5060],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">为了测定某地石灰石中碳酸钙的质量分数，某同学取样品</span><span style=\"font-family: 'Times New Roman';\">12g</span><span style=\"font-family: 宋体;\">放入烧杯中，加入稀盐酸至恰好不再产生气体时消耗稀盐酸</span><span style=\"font-family: 'Times New Roman';\">100g</span><span style=\"font-family: 宋体;\">（石灰石中的杂质均不溶于水且不与盐酸反应），反应后测得烧杯中剩余物质的总质量为</span><span style=\"font-family: 'Times New Roman';\">107.6g</span><span style=\"font-family: 宋体;\">。</span></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">则上述反应生成二氧化碳的质量为多少</span><span style=\"font-family: 'Times New Roman';\">g</span><span style=\"font-family: 宋体;\">？</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">计算出此地石灰石中碳酸钙的质量分数？</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（3）</span><span style=\"font-family: 宋体;\">反应后所得溶液中溶质的质量分数是多少？</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 'Times New Roman';\">4.4g</span><p style=\"text-align:justify;word-break:break-word\"><span style=\"font-family: 宋体;\">根据质量守恒定律，反应后减少的质量为产生二氧化碳的质量，反应生成二氧化碳的质量为</span><span style=\"font-family: 'Times New Roman';\">12g+100g</span><span style=\"font-family: 宋体;\">-</span><span style=\"font-family: 'Times New Roman';\">107.6g=4.4g</span><span style=\"font-family: 宋体;\">；</span></p></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 'Times New Roman';\">83.3%</span><p style=\"text-align:justify;word-break:break-word\"><span style=\"font-family: 宋体;\">解：设参加反应的碳酸钙质量为</span><span style=\"font-family: 'Times New Roman';font-style: italic;\">x</span><span style=\"font-family: 宋体;\">，生成氯化钙的质量为</span><span style=\"font-family: 'Times New Roman';font-style: italic;\">y</span><span style=\"font-family: 宋体;\">，</span></p><p style=\"text-align:justify;word-break:break-word\"><img  src=\"https://img.xkw.com/dksih/formula/4c5e3a65ee8eb1c89087dffe9dd9340f.svg\" class=\"xkw-math-img\" /></p><p style=\"text-align:justify;word-break:break-word\"><span style=\"font-family: 宋体;\">此地石灰石中碳酸钙的质量分数为</span><img  src=\"https://img.xkw.com/dksih/formula/a14fe1ca923ffbd117af2bcd22c132b5.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 'Times New Roman';\">×100%≈83.3%</span><span style=\"font-family: 宋体;\">；</span></p></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（3）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 'Times New Roman';\">10.5%</span><p style=\"text-align:justify;word-break:break-word\"><span style=\"font-family: 宋体;\">反应后所得溶液中溶质的质量分数为</span><img  src=\"https://img.xkw.com/dksih/formula/34e9c89091c09f9feca08f755a1ab0a4.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 'Times New Roman';\">×100%≈10.5%</span><span style=\"font-family: 宋体;\">；</span></p><p style=\"text-align:justify;word-break:break-word\"><span style=\"font-family: 宋体;\">答：反应生成二氧化碳的质量为</span><span style=\"font-family: 'Times New Roman';\">4.4g</span><span style=\"font-family: 宋体;\">；此地石灰石中碳酸钙的质量分数为</span><span style=\"font-family: 'Times New Roman';\">83.3%</span><span style=\"font-family: 宋体;\">；反应后所得溶液中溶质的质量分数为</span><span style=\"font-family: 'Times New Roman';\">10.5%</span><span style=\"font-family: 宋体;\">。</span></p></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">见答案；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">见答案；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(3)小问详解： <p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">见答案。</span></p></div></div>","create_date":"2023-02-23 23:29:26","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4751,"name":"实验三 二氧化碳实验室制取与性质"},{"id":4793,"name":"4.3 二氧化碳的实验室制法"},{"id":4617,"name":"第二节 溶液组成的定量表示"},{"id":4705,"name":"第2节 溶液组成的表示"},{"id":4840,"name":"第二节 溶液组成的定量表示"},{"id":4967,"name":"课题3 溶液的浓度"},{"id":5018,"name":"课题3 溶液的浓度"},{"id":4912,"name":"第二节 海水“晒盐”"},{"id":5060,"name":"实验4 二氧化碳的实验室制取与性质"}],"type":{"id":"1409","name":"计算题"},"kpoints":[{"id":214,"name":"制取二氧化碳的原理"},{"id":39,"name":"有关质量守恒定律的计算"},{"id":361,"name":"溶液和化学方程式的综合计算"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"120111","name":"西青区"},"title":"天津市西青区华苑枫叶国际学校2022-2023学年九年级上学期期末化学试题"}]},{"id":"3181195991179264","course_id":14,"type_id":"1402","kpoint_ids":[202,334,10],"catalog_ids":[4792,4616,4704,4758,4839,4886,4965,5016,5046],"years":[2023],"difficulty":0.9450000000000001,"difficulty_level":17,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">习近平总书记在推进南水北调后续工程高质量发展座谈会上强调：水是生命之本、文明之源。</span></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">净水器中常用活性炭去除水中的杂质，该净化过程主要涉及的变化属于</span><span class=\"qml-bk\" index=\"1\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">变化。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">在水中加入洗涤剂可以除去衣物上的油污，这是利用了洗涤剂的</span><span class=\"qml-bk\" index=\"2\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">作用。</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  qml-exact\"><span style=\"font-family: 宋体;\">物理</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  qml-exact\"><span style=\"font-family: 宋体;\">乳化</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"\"><span>净水器中常用活性炭去除水中的杂质，活性炭具有疏松多孔的结构，具有吸附性，可以吸附色素和异味，该净化过程没有新物质生成，主要涉及的变化属于物理变化；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"\"><span>在水中加入洗涤剂可以除去衣物上的油污，这是利用了洗涤剂的乳化作用，可以将油滴分散成无数细小的液滴随水冲走。</span></p></div></div>","create_date":"2023-02-23 23:02:43","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4792,"name":"4.2 碳"},{"id":4616,"name":"第一节 认识溶液"},{"id":4704,"name":"第1节 物质在水中的分散"},{"id":4758,"name":"7.1 溶解与乳化"},{"id":4839,"name":"第一节 溶液的形成"},{"id":4886,"name":"第一节 溶液的形成"},{"id":4965,"name":"课题1 溶液的形成"},{"id":5016,"name":"课题1 溶液的形成"},{"id":5046,"name":"单元2 碳及其化合物"}],"type":{"id":"1402","name":"填空题"},"kpoints":[{"id":202,"name":"活性炭的吸附性"},{"id":334,"name":"乳化现象及应用"},{"id":10,"name":"化学变化与物理变化判断"}],"media":0,"answer_scoreable":1,"tag_ids":[4801],"tags":[{"id":4801,"name":"典型例题"}],"source_papers":[{"area":{"id":"510922","name":"射洪市"},"title":"四川省遂宁市射洪市2022-2023学年九年级上学期期末化学试题"}]},{"id":"3181164333268992","course_id":14,"type_id":"1402","kpoint_ids":[12,49],"catalog_ids":[4696,4828,38564,4999,4950,4742,4896,4785,4609],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">“洁厕灵”（含有盐酸）与“消毒液”（含有次氯酸钠）混合使用会产生有毒的黄绿色氯气（</span><span style=\"font-family: 'Times New Roman';\">Cl</span><span style=\"font-family: 'Times New Roman';\"><sub>2</sub></span><span style=\"font-family: 宋体;\">），化学方程式为</span><img  src=\"https://img.xkw.com/dksih/formula/8796efdb2de39d47cb627ecc2e2e129c.svg\" class=\"xkw-math-img\" /><span style=\"font-family: 宋体;\">，故应避免二者混用。</span></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">通过化学方程式可推测</span><span style=\"font-family: 'Times New Roman';\">X</span><span style=\"font-family: 宋体;\">代表次氯酸钠，该物质含有</span><span class=\"qml-bk\" index=\"1\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">元素（填写元素符号）；</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">描述氯气物理性质的话是</span><span class=\"qml-bk\" index=\"2\" size=\"11\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 'Times New Roman';\">Na</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">Cl</span><span style=\"font-family: 宋体;\">、</span><span style=\"font-family: 'Times New Roman';\">O</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span style=\"font-family: 宋体;\">黄绿色</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"\"><span>反应前后原子的种类和个数不变，等号右边有2个钠原子、3个氯原子、2个氢原子和1个氧原子，等号右边除X外，有2个氢原子和2个氯原子，则X中含有1个钠原子、1个氯原子和1个氧原子，则X的化学式为NaClO，则该物质含有钠、氯、氧三种元素，符号为Na、Cl、O。</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"\"><span>由资料可知，氯气为黄绿色气体。</span></p></div></div>","create_date":"2023-02-23 21:58:18","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4696,"name":"第3节 化学方程式的书写与应用"},{"id":4828,"name":"第二节 化学反应的表示"},{"id":38564,"name":"综合复习与测试"},{"id":4999,"name":"课题2 如何正确书写化学方程式"},{"id":4950,"name":"课题2 如何正确书写化学方程式"},{"id":4742,"name":"4.4 化学方程式"},{"id":4896,"name":"第二节 化学反应的表示"},{"id":4785,"name":"2.3 化学变化中的质量守恒"},{"id":4609,"name":"第二节 化学方程式"}],"type":{"id":"1402","name":"填空题"},"kpoints":[{"id":12,"name":"化学性质和物理性质"},{"id":49,"name":"根据方程式推测化学式"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"410325","name":"嵩县"},"title":" 河南省洛阳市嵩县2022-2023学年九年级上学期期末化学试题"}]},{"id":"3181153463492608","course_id":14,"type_id":"140101","kpoint_ids":[40,52468,85,71],"catalog_ids":[4741,5050,4785,4998,4895,4695,4827,4949,4608],"years":[2023],"difficulty":0.8500000000000001,"difficulty_level":18,"stem":"<div class=\"qml-stem\"><p style=\"text-align:justify;word-break:break-word\"><span style=\"font-family: 宋体;\">逻辑推理是化学学习常用的思维方法。下列说法正确的是</span></p><div class=\" qml-og\"><table class=\"qml-og\" style=\"width:100%\"><tr><td>A.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">某物质在氧气中燃烧生成水和二氧化碳，则该物质一定含有碳、氢、氧三种元素</span></span></td></tr><tr><td>B.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">分子和原子都是不显电性的粒子，所以不显电性的粒子一定是分子或原子</span></span></td></tr><tr><td>C.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">化合物中含有多种元素，因此由同种元素组成的物质一定不是化合物</span></span></td></tr><tr><td colspan=\"1\">D.&nbsp;<span class=\"qml-op\"><span style=\"font-family: 宋体;\">氧化物中含有氧元素，所以含有氧元素的化合物一定是氧化物</span></span></td></tr></table></div></div>","answer":"<div class=\"qml-answer\"><span class=\"qml-an-sq\"><span class=\"qml-an qml-isop \">C</span></span></div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-seg\" seg-name=\"详解\">【详解】<p style=\"\"><span>A、化学反应前后，元素种类不变，生成物中共含有碳、氢、氧三种元素，均来自反应物，物质在空气中燃烧是和空气中氧气反应，氧气作为反应物由氧元素组成，可推断出另一种反应物中一定含有碳、氢这两种元素，可能含有氧元素，A错误；</span></p><p style=\"\"><span>B、不显电性的粒子不是只有分子和原子，中子也不显电性，B错误；</span></p><p style=\"\"><span>C、组成中含有不同种元素的纯净物是化合物，即化合物中至少含有两种元素，由同种元素组成的物质可能是单质，也可能是混合物，但一定不是化合物，C正确；</span></p><p style=\"\"><span>D、氧化物必须是由两种元素组成，其中一种是氧元素的化合物，含氧元素的化合物不一定是氧化物，如高锰酸钾，D</span><span style=\"style: caret-color: red;;\">错误。</span></p><p style=\"\"><span style=\"style: caret-color: red;;\">故选C。</span></p></div></div>","create_date":"2023-02-23 21:36:12","paper_type_ids":[5],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4741,"name":"4.3 质量守恒定律"},{"id":5050,"name":"单元2 质量守恒定律"},{"id":4785,"name":"2.3 化学变化中的质量守恒"},{"id":4998,"name":"课题1 质量守恒定律"},{"id":4895,"name":"第一节 化学反应中的质量守恒"},{"id":4695,"name":"第2节 化学反应中的质量关系"},{"id":4827,"name":"第一节 化学反应中的质量守恒"},{"id":4949,"name":"课题1 质量守恒定律"},{"id":4608,"name":"第一节 质量守恒定律"}],"type":{"id":"140101","name":"单选题"},"kpoints":[{"id":40,"name":"用质量守恒定律确定物质组成"},{"id":52468,"name":"氧化物的定义"},{"id":85,"name":"原子结构"},{"id":71,"name":"单质和化合物的判断"}],"media":0,"answer_scoreable":1,"tag_ids":[4801],"tags":[{"id":4801,"name":"典型例题"}],"source_papers":[{"area":{"id":"511102","name":"市中区"},"title":"四川省乐山市市中区2022-2023学年九年级上期期末化学试题"}]},{"id":"3180943661268992","course_id":14,"type_id":"1403","kpoint_ids":[47,283,607],"catalog_ids":[4785,5013,4755,4916,4700,4859,4963,4622,5069],"years":[2023],"difficulty":0.65,"difficulty_level":19,"stem":"<div class=\"qml-stem\"><p style=\"text-align: left;\"><span style=\"font-family: 宋体;\">在实验室里可以利用如图所示的装置进行还原氧化铁的实验。</span></p><p style=\"text-align: left;\"><img  src=\"https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/e04c482c-0ef0-44da-be3a-29f490d04465.png\" width=\"398\" height=\"181\" /></p><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（1）</span><span style=\"font-family: 宋体;\">在点燃酒精喷灯前先通入一段时间一氧化碳的目的是</span><span class=\"qml-bk\" index=\"1\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（2）</span><span style=\"font-family: 宋体;\">硬质玻璃管中反应的化学方程式为</span><span class=\"qml-bk\" index=\"2\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div><div class=\"qml-sq\" id-container=\"question\"><div class=\"qml-stem\"><br/><span class=\"ques-no\">（3）</span><span style=\"font-family: 宋体;\">实验中还需补充的一个装置</span><span style=\"font-family: 'Times New Roman';\">C</span><span style=\"font-family: 宋体;\">是</span><span class=\"qml-bk\" index=\"3\" size=\"6\" type=\"underline\" style=\"text-decoration:underline\" >　　　　　　</span><span style=\"font-family: 宋体;\">。</span></div></div></div>","answer":"<div class=\"qml-answer\">（1）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span>排尽装置中的空气，防止加热时发生爆炸</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（2）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><img  src=\"https://img.xkw.com/dksih/formula/3dbdde2c852ec81a536593cfff1599fa.svg\" class=\"xkw-math-img\" /><br  /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（3）<span class=\"qml-an-sq\" id-container=\"question\"><span class=\"qml-an  \"><span>在右端导管用酒精灯点燃尾气或用气球收集</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>","explanation":"<div class=\"qml-explanation\"><div class=\"qml-exps-sq\" id-container=\"question\">(1)小问详解： <p style=\"\"><span>可燃性气体与空气混合加热时可能会发生爆炸，故在点燃酒精喷灯前先通入一段时间一氧化碳的目的是排尽装置中的空气，防止加热时发生爆炸；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(2)小问详解： <p style=\"\"><span>一氧化碳具有还原性，高温下能与氧化铁反应生成铁和二氧化碳，故反应的化学方程式为：</span><img  src=\"https://img.xkw.com/dksih/formula/3dbdde2c852ec81a536593cfff1599fa.svg\" class=\"xkw-math-img\" /><span>；</span></p></div><div class=\"qml-exps-sq\" id-container=\"question\">(3)小问详解： <p style=\"\"><span>一氧化碳有毒，直接排放到空气中会污染环境，在C处用酒精灯点燃尾气或用气球收集，故实验中还需补充的一个装置C是在右端导管用酒精灯点燃尾气或用气球收集。</span></p></div></div>","create_date":"2023-02-23 14:29:21","paper_type_ids":[27],"course":{"id":14,"name":"初中化学"},"catalogs":[{"id":4785,"name":"2.3 化学变化中的质量守恒"},{"id":5013,"name":"课题3 金属资源的利用和保护"},{"id":4755,"name":"6.3 金属矿物与冶炼"},{"id":4916,"name":"第一节 常见的金属材料"},{"id":4700,"name":"第2节 金属矿物 铁的冶炼"},{"id":4859,"name":"第一节 常见的金属材料"},{"id":4963,"name":"课题3 金属资源的利用和保护"},{"id":4622,"name":"第三节 金属的冶炼与防护"},{"id":5069,"name":"单元3 金属的锈蚀和防护"}],"type":{"id":"1403","name":"实验题"},"kpoints":[{"id":47,"name":"化学方程式的书写"},{"id":283,"name":"一氧化碳还原氧化铁实验"},{"id":607,"name":"污染性、可燃性尾气的处理"}],"media":0,"answer_scoreable":0,"tag_ids":[],"tags":[],"source_papers":[{"area":{"id":"610111","name":"灞桥区"},"title":"2023年陕西省西安市第五十五中学中考二模化学试题"}]}],"session_id":"a62dc453-d1b9-4425-bf30-91a2de1def66"}