初中化学氢气还原氧化铜的实验中 ,按教材要求实验完毕后 ,在试管壁上总附有一层被还原出来的光亮的红色铜 ,不管用酸碱及洗涤剂怎样处理 ,仍难洗净 ,这是使用粉末CuO来做这一实验带来的不快。如果在做实验时 ,不使用粉末CuO ,而是作如下改进 ,则情况就大不一样了。方法一 :实 In the experiment of junior high school chemical hydrogen reduction of copper oxide, after the experiment is completed according to the teaching materials, there is always a layer of bright red copper that has been reduced on the wall of the test tube. It is difficult to clean it regardless of the treatment with acid and alkali and detergent. This is the unpleasantness of using powdered CuO for this experiment. If you do experiments without using powdered CuO, but make the following improvements, the situation will be very different. Method One: Real