初中化学中有三处“还原氧化铜”实验的演示。为了使实验更加鲜明准确,可作如下改进一、课本73页“氢气还原氧化铜”实验,所用的氧化铜粉末,反应结果生成的铜,不具有金属光泽。如改用电灯花线中细铜丝灼烧其表面成的氧化铜(此反应可在讲氧气性质时让学生熟悉)代替,当通入氢气少许,加热,即可看到氧化铜还原成具紫红色光泽的铜,同时试管口有水 There are three junior high school chemistry “reduction of copper oxide” experiment demonstration. In order to make the experiment more vivid and accurate, the following improvements can be made. Textbook 73 “Hydrogen reduction of copper oxide” experiment, the use of copper oxide powder, the reaction results of the resulting copper, do not have a metallic luster. Such as the use of electric wire flower in the thin copper wire on the surface of the burning of copper oxide (this reaction can make students familiar with the nature of oxygen) instead, when a small amount of hydrogen access, heating, you can see the reduction of copper oxide into Fuchsia gloss copper, while test tube mouth water