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如何检验二价铁

更新时间: 2020-09-16 00:00:00     

检验二价铁的方法:

1、观察溶液颜色:二价铁离子,是绿色的,可以通过溶液颜色判断;

2、向溶液中加入硫氰化钾溶液,溶液不显血红色,然后加入氯水,显血红色,则溶液中含有亚铁离子;

3、向溶液中加入氢氧化钠溶液,生成白色沉淀,白色沉淀迅速变成灰绿色,最后变成红褐色,证明溶液中有铁离子;

4、向溶液中加入酸性高锰酸钾,若褪色,则溶液中有二价铁,若不褪色,则没有二价铁。

关键词: 如何 检验

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