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Colour of FeSO4.7H2O crystals is blue green in colour.
Its colour changes to brown on heating as the water molecule is removed and Fe2O3 is formed after decomposition.
2FeSO4=Fe2O3+SO2+SO3
Its colour changes to brown on heating as the water molecule is removed and Fe2O3 is formed after decomposition.
2FeSO4=Fe2O3+SO2+SO3
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