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近年来,弱电解质的电离一直是包括全国卷在内的各地高考的命题热点。题中常将其与溶液的酸碱性、盐类的水解、离子浓度大小等结合来综合考查学生对弱电解质概念的理解以及对弱电解质电离平衡的综合分析和定量计算能力。本文主要介绍解题中电离平衡常数的3种应用。应用一:根据电离平衡常数判断弱酸弱碱及其对应盐的相对强弱。相同温度下,电离平衡常数即K值越
In recent years, the ionization of weak electrolyte has been a hot topic in the college entrance examination throughout the country, including the volume. Problem often with the solution pH, salt hydrolysis, the concentration of ions combined to comprehensively examine the students’ understanding of the concept of weak electrolyte and weak electrolyte balance of the comprehensive analysis and quantification of the ability to calculate. This article mainly introduces three kinds of applications of ionization equilibrium constants in solving problems. Application one: According to the ionization equilibrium constant to determine the relative strength of weak acid and alkali and its corresponding salt. The same temperature, ionization equilibrium constant that K value of the more