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检验硝酸亚铁是否变质

更新时间: 2020-08-17 00:00:00     

1、加入硫氰化钾,若溶液变为血红色则说明亚铁离子已经被氧化成三价铁离子;

2、加入硫氰化钾,若溶液不变红色则说明硝酸亚铁未变质;

3、若确定硝酸亚铁已经变质,可以加入铁粉重新将三价铁离子还原成亚铁离子。

关键词: 检验 硝酸 是否 变质

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