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一、探究蜡烛燃烧产物的实验改进1.原实验存在的问题(1)教材中的实验需要一个冷而干燥的烧杯和一个用澄清石灰水润湿内壁的烧杯,需要的仪器多,且需做两次实验来探究蜡烛燃烧后的产物,耗时多。(2)学生较难把握用澄清石灰水润湿烧杯内壁的操作。表现在:澄清石灰水量少了
First, to explore the experimental improvement of candle burning products 1. Problems in the original experiment (1) The experiment in the teaching materials requires a cold and dry beaker and a beaker that wets the inner wall with clarified lime water. The required instruments are numerous and need to be done. Two experiments to explore the candle burning product, time-consuming. (2) It is difficult for students to grasp the operation of wetting the beaker’s inner wall with clarified lime water. Performance in: Clarified lime water is less