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在讲解电解质的电离时、初学者往往容易造成一种误解:认为电解质的电离是通电以后才发生的。为了给学生树立正确的观点,费了不少嘴舌,其结果是部份学生仍然出错。能不能设计一套装置,用实验加以证明,电解质的电离并不是通电以后才发生的,而是电解质溶于水(或在熔融状态)时就已经发生。我们采用了下列实验装置,利用饱和的NaI溶液实验收到一定的效果,现简介如下:
When explaining the ionization of electrolytes, beginners are often prone to misunderstanding: It is believed that the ionization of electrolytes occurs after power is applied. In order to establish a correct view for the students, it took a lot of talk. As a result, some students still make mistakes. Can we design a device that proves experimentally that the ionization of the electrolyte does not occur after energization, but that it occurs when the electrolyte is dissolved in water (or in the molten state). We have used the following experimental devices and used saturated NaI solutions to receive certain results.