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电离平衡的知识是高中化学重要的基础理论,既是学习的重点,也是学习的难点。弱酸,弱碱的电离平衡是一个动态平衡,当外界条件改变时,电离平衡也会发生移动,从而使得弱酸或弱碱的电离程度有所增减。因此,可以应用平衡移动原理,通过外界改变条件,控制弱酸,弱碱的电离程度。下面主要讨论外界条件对弱酸弱碱电离平衡的影响,更好的帮助学生们掌握好这部分知识。一、结论归纳1.温度的影响。例1:某浓度的醋酸溶液中存在以下平衡:
The knowledge of ionization balance is an important fundamental theory of high school chemistry, which is not only the focus of study but also the difficult point of study. Weak acid, weak base ionization equilibrium is a dynamic equilibrium, when the external conditions change, the ionization equilibrium will shift, so that the weak acid or weak base ionization degree increases or decreases. Therefore, we can use the principle of balanced movement, changing conditions through the outside world to control the degree of ionization of weak acid, weak base. The following discussion of the external conditions on the weak acid weak base ionization equilibrium, better to help students master this part of the knowledge. First, the conclusions summarized 1. Temperature effects. Example 1: The following equilibrium exists in a concentration of acetic acid solution: