化学中的多种守恒关系,几乎都是高考中的热点。在电解质的电离和盐类的水解这两部分知识中,有两种守恒关系经常被用到:电荷守恒和物料守恒。在这里首先认识电荷守恒的相关知识,简单介绍根据电荷守恒判断反应物和生成物、配平离子反应方程式、书写并配平电极反应式以及溶液中离子浓度的相对大小的应用。 Many conservation relations in chemistry are almost all hot spots in the college entrance examination. In the knowledge of the ionization of electrolytes and the hydrolysis of salts, there are two types of conservation relations that are often used: conservation of charge and conservation of materials. Here, we first understand the related knowledge of charge conservation, and briefly introduce the application of judging the relative sizes of reactants and products based on charge conservation, the equation for trim ion reaction, writing and trimming electrode reactions, and the relative concentration of ion concentration in solution.