初中化学人教版第一册的学生实验六，学生在做二氧化碳的灭火实验时，往往集气瓶底已朝上，气体已倒尽，蜡烛火焰却不熄灭，并且几次都不成功，如何找明原因，做好该实验呢？我在指导学生具体操作中总结出应掌握的几点关键，供老师们参考。a．正确收集、验满二氧化碳是灭火实验 Students’ Experiments in the first edition of the Junior High School Chemistry Pedagogy Booklet No.6, when students were doing carbon dioxide extinguishing experiments, the gas collection bottle bottom was already facing upwards, the gas had been poured, the candle flame did not extinguish, and several times were unsuccessful. Find out why, do the experiment? In guiding students in their specific operations, I summed up the key points that should be mastered for teachers’ reference. a. Accurately collecting and testing carbon dioxide is a fire extinguishing experiment