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高二课本173页复习题第1题:在稀释弱电解质溶液时,一般为什么开始时溶液的导电性逐渐增强,以后又逐渐减弱? 这个问题,初看起来是简单的。通常的回答是:溶液的导电性取决于溶液中离子的浓度,在稀释弱电解质溶液时,弱电解质的电离度增大,电离度增大使溶液中离子浓度增大;在稀释弱电解质溶液时,溶液的体积也增大,体积增大使溶液中离子浓度减小。开始稀释时电离度增大得多,体积增大得少,所以溶液中离子浓度随稀释而增大,导电性增强;稀释到一定程度时电离度增大得
Grade 2 Textbook Review Question 1 Question 1: When Diluting Weak Electrolyte Solution, why initially the conductivity of the solution gradually increases at first and gradually weakens later? This problem seems simple at first glance. The general answer is: The conductivity of the solution depends on the concentration of ions in the solution. When the weak electrolyte solution is diluted, the degree of ionization of the weak electrolyte increases, and the degree of ionization increases to increase the concentration of ions in the solution; when the weak electrolyte solution is diluted, The volume of the solution also increases, and the volume increases so that the concentration of ions in the solution decreases. At the beginning of dilution, the degree of ionization increases much and the volume increases less, so the ion concentration in the solution increases with dilution and the conductivity increases; when the concentration is diluted to a certain degree, the degree of ionization increases.