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对于水解盐间反应式的配平,不少中学生感到困难。这是由于一部分同学对水解原理理解不清,不知写什么,怎么写;另一部分同学虽然理解了水解原理,但方法欠妥,结果反应式没有写对,还有不少同学是模仿分步化学反应方程式的写法,即先写出各种盐的离子水解的反应式,然后将各分式子相加而得出总式。但此方法步骤较多,不仅用时不少,而且易出差错。这里介绍一种快速简捷的方法,供参考。
Many middle school students find it difficult to balance the hydrolytic salt reaction. This is because some students understand the principle of hydrolysis, I do not know what to write, how to write; The other part of the students understand the principle of hydrolysis, but the method is not properly, the results of the reaction is not written correctly, there are many students is to imitate step-by-step chemistry The formula for the reaction equation is to write the reaction formula for ion hydrolysis of various salts, and then add the fractions to obtain the total formula. However, this method has many steps. It not only takes a lot of time, but it is prone to errors. Here is a quick and easy method for reference.