如何判断电解质溶液导电性的强弱,是学生较难掌握的一个问题,这与教材中表述的不严密有关。高中课本《化学》(甲种本)第二册123页上写到:“溶液导电性的强弱跟单位体积溶液里能自由移动的离子的多少有关。也就是说,相同体积和浓度的导电性强的溶液里能自由移动的离子数目一定比导电性弱的溶液里的多。”从这段话,得出的 How to judge the strength of the electrolyte solution conductivity is a problem that is difficult for students to grasp, which is related to the rigorous expression expressed in the textbook. In the high school textbook “Chemical” (A kind) this book, page 123, says: “The strength of the solution is related to the amount of ions that can move freely in a unit volume of solution. That is, the same volume and concentration of conductivity. In a strong solution, the number of ions that can move freely is definitely greater than in a solution with a weak conductivity."