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现行高中化学课本有一个电解质溶液导电性的对比实验，通过它说明：其它条件相同时，强电解质在水中能完全电离，通过的电流就大；弱电解质在水中不能完全电离，通过的电流小。在演示时，感到该实验存在不足：只能证明强电解质的水溶液导电能力比弱电解质的强，不能顺理成章地
Current high school chemistry textbooks have a comparative experiment on the conductivity of electrolyte solutions, which shows that when other conditions are the same, strong electrolytes are completely ionized in water and the current passing through is large; weak electrolytes cannot be completely ionized in water and the passing current is small. At the time of the demonstration, I felt that there was a deficiency in the experiment: I can only prove that the strong electrolyte solution has a higher conductivity than the weak electrolyte and cannot be justified.