ferrous英文

oh-能与nh4+和fe2+反应。若不能判断哪个离子先反应，不妨假设。设nh4+先反应，则生成nh3`h20会与fe2+生成fe(oh)2沉淀。设fe2+先反应，生成fe(oh)2沉淀不会影响nh4+。所以oh-先与fe2+反应，少量的naoh就不能生成nh3了。

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