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13问答网 > 写向含汞离的废水中加入硫化钠以除去汞离子，写出化学反应方程式和该方应离子方程式

写向含汞离的废水中加入硫化钠以除去汞离子，写出化学反应方程式和该方应离子方程式

2025-03-15 10:18:24

推荐回答（2个）

回答1：

废水除汞，是在废水中加入过量的硫化钠，使汞离子与硫离子生成不溶于水的硫化汞沉淀出来。
化学方程式为：Hg(NO3)2+Na2S=HgS↓+2NaNO3离子方程式为：Hg2+ + 2S2- = 2HgS↓

回答2：

废水除汞，是在废水中加入过量的硫化钠，使汞离子与硫离子生成不溶于水的硫化汞沉淀出来。
Hg2+ + 2S2- = 2HgS↓

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