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在现行初中化学教材中，氢气还原氧化铜实验是用来说明氢气性质和氧化还原反应的实验。它既是演示实验，又是学生实验，在教学中具有十分重要的地位和作用。笔者对该实验的一些具体细节进行了探索，收到了十分满意的效果。ａ．试管大小的选择。在此实验中，人们习惯选用１５ｍ
In the current junior middle school chemistry textbook, hydrogen reduction copper oxide experiments are used to illustrate the nature of hydrogen and redox reaction experiments. It is both a demonstration experiment and a student experiment. It has a very important position and role in teaching. The author explored some of the details of the experiment and received very satisfactory results. a. Selection of test tube size. In this experiment, people used to choose 15m