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What is the colour of FeSO4. 7H2O crysta...

What is the colour of `FeSO_4. 7H_2O` crystals? How does this colour change upon heating? Give balanced chemical equation for the changes.

Text Solution

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`FeSO_4. 7H_2O` is green in colour and loses water of crystallisation when it is heated.
It is then dicomposed to `Fe_2O_3` (brown coloured), `SO_2 and SO_3`
`FeSO_4. 7H_2O to^(Delta)FeSO_4+7H_2O`
`2FeSO_4(s)to^(Delta)Fe_2O_3(s)+SO_2(g)+SO_3(g)`
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