天气预报 > 财经 > 硫化铁是沉淀吗
硫化铁是沉淀吗
更新时间: 2021-04-19 05:28:52  

1、二硫化铁,硫化亚铁,三硫化二铁都不溶于水。为什么在酸中硫化亚铁不是沉淀,而硫化铜是沉淀 : 因为硫化铜的容积度常数极小,使溶液中无法生成硫化氢气体,而硫化亚铁不能。

2、硫化铁为黑色固体,常温下易转变为黄绿色。硫化铁在空气中容易被氧化,因此自然界中不存在,只能通过实验室化学方法制备。

关键词: 硫化 沉淀

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