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如何去除硝酸根离子

更新时间: 2020-07-01 00:00:00     

1、蒸馏,硝酸盐因沸点高于溶剂而不能被蒸出,从而实现分离;

2、结冰,水溶液在部分结冰时会把部分溶质留在溶液中,冰里含有的溶质会比较少,再把冰从溶液里捞出,熔化,就可以得到含有硝酸根离子比较少的水;

3、反应法,先用锌、镉等活泼金属单质把硝酸根离子还原成亚硝酸根,然后加入铵盐加热即可。

关键词: 如何 去除 硝酸 离子

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