加酸抑制盐类水解的一种通用解析方法

The Uniform Explaining Method of Adding Acid to Inhibit Hydrolysis of Salt

观察SnCl2 水解的离子方程式 :Sn2 + +Cl- +H2 O =Sn(OH)Cl↓ +H+ ,往平衡体系中加入稀HCl,左边增加了Cl- 浓度 ,右边同等程度地增加了H+ 的浓度 ,平衡似应不移动 ,怎样解释 ?

Observe the ionic equation of SnCl 2 hydrolytic decomposition:Sn 2+ +Cl -+H 2O=Sn(OH)Cl↓+H + ,Adding dilute hydrochloric acid into the equilibrium system,the left has increased Cl - concentration,and the right has increased H + concentration in equal degree.The equilibrium seems not to change.How to explain it?This article introduces a uniform explaining method about this kind of problems.