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Mention the colour of FeSO(4). 7H(2)O cr...

Mention the colour of `FeSO_(4). 7H_(2)O` crystals . How does this colour change upon heating ? Give balanced chemical equation for the change.

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Light green is the colour of crystalline `FeSO_(4).7H_(2)O`.
Light green changes to reddish brown or brown upon heating .
(i) `FeSO_(4).7H_(2)O overset Delta rarr FeSO_(4)+7H_(2)O`
(ii) `2FeSO_(4) overset "Heat" rarr Fe_(2)O_(3)+SO_(2)+SO_(3)`
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