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在近年高考中常出现一类用一种试剂一次鉴别多种物质的鉴别题。由于限制了试剂的使用,因而在—定程度上增加厂试题难度。下面介绍一种既快速又准确解答这类试题的方法——阴阳匹配法。一、方法介绍首先对所要鉴别物质的阴阳离子分别进行鉴别,把鉴别用的阴阳离子分别匹配组成物质,然后一一试之,就可立即得出结论。
In recent college entrance examinations, there has often been a category of identification questions that use a single reagent to identify multiple substances at once. As the use of reagents is limited, the difficulty of factory test questions is increased to a certain extent. The following describes a quick and accurate answer to this kind of test questions - yin and yang matching method. First, the method introduced first identify the cations and cations of the substance to be identified, and identify the yin and yang ions used to identify the composition of the substance, and then try it out, and you can immediately reach a conclusion.