1.

Mention the colour of FeSO4.7H2O crystals. How does this colour change upon heating ? Give balanced chemical equation for the change.

Answer»

Light green is the Colour of crystalline FeSO4.7H2O. Light green changes to reddish brown or brown upon heating.

(i) FeSO4.7H2O+heat  FeSO4+7H2O

(ii) 2FeSO4+heat  Fe2O3+SO2+SO3



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