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初中化学第八章有一类实验设计题 ,要求证明三种金属的金属活动性顺序 .证明的方法虽有多种 ,但使用试剂种类最少、步骤最简单的实验设计方案是 :选择三种试剂 ,通过两步反应就能证明出来 .具体的方法又分为两种 : 选择三种金属中活动性排在中间的单质以及前后两种金属的盐溶
Junior High School Chemicals Chapter 8 has a class of experimental design questions that require proof of the sequence of metal activity of the three metals. Although there are many ways to prove the use of the reagents, the experimental design scheme with the fewest reagents and the simplest steps is: Select three reagents, It can be proved through two steps of reaction. The specific methods can be divided into two kinds: Selecting the middle substance in the three metals and the salt of the two metals before and after