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在中学教材里,我们所遇到的盐和盐的反应,大部分是相互交换离子,生成两种新盐的反应。因此,在化学教学的初级阶段,常把盐和盐的反应,归结为复分解反应。然而,随着中学教材中有关电解质溶液知识的加深,上述概括就显得十分狭隘了。今就中学教材中可能遇到的盐和盐之间的反应,归纳为如下几种类型,并将其中容易混淆的问题进行必要的讨论,以求获得一般反应的规律性。
In the high school textbooks, most of the salt and salt reactions we encountered were the exchange of ions and the reaction of two new salts. Therefore, in the initial stage of chemistry teaching, the reactions of salt and salt are often attributed to metathesis reactions. However, with the deepening of knowledge about electrolyte solutions in middle school textbooks, the above summary is very narrow. The reactions between salt and salt that may be encountered in high school textbooks today are summarized in the following types and the necessary ambiguities are discussed in order to obtain the regularity of general reactions.