通过污水中Ag~+的除去这一实际问题的解决,将“有难溶物生成的离子反应”转化为“难溶电解质溶解的问题”.然后利用化学平衡理论这一核心概念指导难溶电解质的生成、溶解、转化的学习,形成了难溶电解质溶解平衡的基本理论. The solution to the practical problem of removing Ag + in wastewater is to convert the “ionic reaction of insoluble matter” to “the problem of dissolution of poorly-soluble electrolyte.” Then, using the core concept of chemical equilibrium theory Guide the formation of insoluble electrolyte, dissolution, conversion of learning, formed a balance of insoluble electrolyte dissolution of the basic theory.