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化学实验内容繁多,装置复杂,尤其气体的制取,特别易于混淆。因此,教师要创新教学模式和方法,采取一种巧妙的记忆方法巧记化学实验,以取得较好的教学效果。下面介绍一种歌诀记忆的方法。一、氧气制取的记忆方法①制氧装置有顺序,从左到右要放稳。②实验先查气密性,受热均匀试管倾。③收集常用排水法,先撤导管后移灯。说明:①制取氧的装置有一定的顺序,应按照从左到右的联接顺序组
A wide range of chemical experiments, the device is complex, especially the gas preparation, especially easy to confuse. Therefore, teachers should innovate teaching modes and methods, take a clever memory method cleverly remember chemical experiments in order to achieve better teaching results. Here's a way to remember songs. First, the oxygen from the memory of the method ① oxygen devices have the order, from left to right to put stability. ② check the first air tightness test, heated uniform test tube dumping. ③ Collection of commonly used drainage method, first remove the catheter after the lamp. Description: ① system of oxygen production has a certain order, in accordance with the order from left to right connection group