由硫铁矿烧渣(主要成分:Fe
3O
4、Fe
2O
3和FeO)得到绿矾(FeSO
4·7H
2O),再通过绿矾制备铁黄[FeO(OH)]的流程如下:烧渣
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmunderover%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3Cmtext%3E%E2%91%A1%3C%2Fmtext%3E%3Cmrow%3E%3Cmsub%3E%3Cmrow%3E%3Cmtext%3EFeS%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmtext%3E2%3C%2Fmtext%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3C%2Fmunderover%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
溶液
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmunder%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3Cmtext%3E%E2%91%A2%3C%2Fmtext%3E%3C%2Fmunder%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
绿矾
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmunderover%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3Cmtext%3E%E2%91%A3%3C%2Fmtext%3E%3Cmrow%3E%3Cmtext%3E%E6%B0%A8%E6%B0%94%2F%E7%A9%BA%E6%B0%94%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmunderover%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
铁黄。已知:FeS
2和铁黄均难溶于水。下列说法正确的是( )
- A、步骤①可用盐酸来溶解烧渣
- B、步骤②涉及的离子反应为S2-+8Fe3++4H2O=8Fe2++SO42-+8H+
- C、步骤③将溶液加热到有少量晶膜出现时停止加热,再冷却结晶析出绿矾
- D、步骤④反应条件控制时要让氨气过量,控制强碱性环境,可以提高产品纯度