论文部分内容阅读
化学平衡常数是表征一个可逆反应在一定温度下进行程度的物理量,是反应限度最根本的表现.自新课改以来,这一知识内容一直是高考考查的热点,需要关注.下面将化学平衡常数的典型考查方式归类分析如下,供参考.一、考查化学平衡常数表达式的书写解题指要(1)由于固体或纯液体的浓度是一常数,如果反应中有固体或纯液体参加或生成,则表达式中不能出现固体或纯液体;稀溶液中进行的反应,如有水参加反应,由于水的浓度是常数而不必出现在表达式中;非水溶液中进行的反应,若有水参加或生成,则应出现在表达式中,如酯化反应.(2)化学平衡常数表达式的书写形式与反应方程式的书写形式直接相
Chemical equilibrium constant is to characterize a reversible reaction in a certain degree of physical temperature, is the most fundamental manifestation of the reaction limit.From the new curriculum reform, the content of knowledge has been a hot spot for college entrance examination, you need to pay attention to the following chemical equilibrium constant The typical examination methods are categorized and analyzed as follows: I. Examining the expression of chemical equilibrium constants (1) Since the concentration of solid or pure liquid is a constant, if there is a solid or pure liquid in the reaction or Generated, the expression can not appear solid or pure liquid; the reaction in dilute solution, if water participate in the reaction, the concentration of water is constant and does not appear in the expression; reaction in non-aqueous solution, if water Participate or generate, it should appear in the expression, such as esterification reaction. (2) chemical equilibrium constant expression of the written form and the response equation of the direct form