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现行人教版九年级化学教材取消了一氧化碳还原氧化铜实验,只是讲述一氧化碳和木炭一样具有还原性,并给出了其反应方程式,这使得学生对一氧化碳还原氧化铜的认识不够直观。笔者查阅了旧版人教版初三化学教材中的一氧化碳还原氧化铜实验,该实验由于尾气处理不当而存在污染空气的缺陷,人教版新课标试用教材对其作了改进:用气球收集尾气或通过燃烧的方式处理尾气。由于用气球收集尾气需要一定的压力,因此不能做到完全无害化,而燃
The current ninth-grade chemistry textbook of the People’s Education Center cancels the experiment of reducing copper oxide by carbon monoxide. It just tells that carbon monoxide is as reducing as charcoal and gives its reaction equation. This makes students less intuitive about carbon monoxide reducing copper oxide. The author reviewed the carbon monoxide reduction copper oxide experiment in the old version of the third edition of the PEP Chemistry Textbook. This experiment has the disadvantage of polluting the air due to improper exhaust gas treatment. The new teaching standard of the People’s Education Press has improved the trial textbooks: Collecting exhaust gas with balloons. Or treat the exhaust gas by burning it. Since the use of balloons to collect exhaust gas requires a certain amount of pressure, it cannot be completely harmless.