测定空气中氧气含量实验的内容不多,但里面隐含的知识点较多,不少同学对此知之甚少,常在考试中失分.为了帮助大家更好地理清思路,笔者特对这一实验要点进行归类整理,以供同学们参考.一、实验原理(或依据)依据某一实验内容消耗空气中的某一主要气体,而与其它气体不发生反应,且没有别的气体生成,从而造成气体压强降低. The content of oxygen content in the air is not much, but there are more knowledge points hidden in it. Many students know little about this and often lose points in the exam. To help everyone better understand the geography, the author specifically An experimental point is categorized and arranged for the students to refer to. First, the experimental principle (or basis) consumes one of the main gases in the air according to the contents of an experiment, but does not react with other gases, and no other gas is generated. , resulting in reduced gas pressure.