人教版《化学》教材九年级上册第50页的验证分子运动的实验(如图1所示),我认为存在以下问题:1.浓氨水有很强的刺激性气味,不在密闭装置中进行会污染环境;2.所需药品量太大,很浪费;3.不适宜学生做分组实验。我自己动手,也做了两个简单的小装置进行实验,效果很好,大家跟我一起试试吧!具体如下: People experiment version of “chemistry” textbook grade nine on page 50 of the verification of molecular motion experiments (Figure 1), I think the following problems: 1. Concentrated ammonia water has a strong pungent odor, not in a closed device Will pollute the environment; 2 the amount of drugs required is too large, very wasteful; 3 unsuitable for students to do group experiments. I do it myself, but also done two simple experiments, the effect is very good, we try it with me! As follows: