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一、解题方法以验证Zn,Fe,Cu三种金属的活泼性强弱为例来说明。方法 1:将一种金属与另一种金属的盐溶液反应;取“活泼金属不活泼金属盐溶液”的方法(盐要可溶于水);从三种金属中取一种最活泼的金属,将其插入活泼性位于中间的金属的盐溶液中。然后将活泼性位于中间的金属,插入最不活泼金属的盐溶液中。实验验证:将Zn,Fe两金属片分别插入Fe SO4,Cu SO4溶液中。(1)将Zn片插入Fe SO4溶液中。
First, the problem solving method to verify the Zn, Fe, Cu three metals as strong and weak as an example to illustrate. Method 1: The reaction of a metal with a salt solution of another metal; method of taking “active metal inactive metal salt solution” (salt must be soluble in water); take one of the three metals most lively The metal is inserted into the salt solution of the metal that is active in the middle. Then the metal, which is active in the middle, is inserted into the salt solution of the least active metal. Experimental verification: The two metal pieces of Zn and Fe were inserted into Fe SO4 and Cu SO4 solutions, respectively. (1) Insert Zn flakes into Fe SO4 solution.