同学们在学习了复分解反应后一般都了解复分解反应进行完全的条件 ,但要证明判断何种物质在溶液中可相互发生复分解反应 ,在注意把握好复分解反应的概念 (两种物质 <酸、碱或盐 >在溶液中相互交换离子 ,生成物中如果有沉淀析出 ,有气体放出 ,或有水生成 )的同时可借助溶解性表作归纳分析 After learning about the metathesis reaction, students generally understand the complete conditions of the metathesis reaction. However, it is necessary to prove that the substances in the solution can undergo metathesis reaction in the solution, and pay attention to the concept of metathesis reaction (two substances: acid and alkali. Or salt> exchange ions in solution, precipitate if precipitated, evolve gas, or generate water)