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物质导电性的实验是初中化学的重要实验之一,该实验通过分析酸碱盐导电的原因,让学生认识到酸碱盐溶液中存在着大量自由移动的阴阳离子。可是,人教版九年级教材所使用的实验装置却相对复杂(图1),需要大量的溶液才能观察到明显的实验现象,且演示也不方便。为此,笔者对该实验装置进行了改进,自制了一款“检测物质导电性简易装置”。
The experiment of material conductivity is one of the important experiments in chemistry of junior middle school. Through analyzing the reason of conductivity of acid-base salt, students can realize that there are many free-moving anion and cation in acid-base salt solution. However, the experimental device used in the PEP textbook is relatively complicated (Figure 1). A large amount of solution is required to observe the obvious experimental phenomena and the demonstration is inconvenient. To this end, the author of the experimental device has been improved, made a “test material conductivity simple device ”.