巧用具支试管改进化学实验

Improvement of Chemical Experiment in Test Tube with Side Tube

巧用具支试管改进了＂钠与硫酸铜溶液的反应＂＂氢氧化亚铁的制备＂＂铜与浓硫酸反应＂等实验,不仅节约药品、操作简便、快捷,而且现象明显,既适合教师演示实验,更利于学生开展探究实验。

This paper improved several chemical experiments using test tube with side tube,such as reaction of sodium and copper sulphate solution,the preparation of ferrous hydroxide and reaction between copper and concentrated sulfuric acid.These experiments were simple to operate,with obvious phenomena and less reagents,which were suitable for the teachers＇ demonstration,and more conducive to the students to carry out inquiry experiments.