what is the colour of ferrous sulphate crystals how does this change after heating?
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On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed. So their colour changes from light green to white. On further heating, anhydrous ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3). ok
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After heating the colour of crystals becomes reddish brown.
2FeSO4--------Fe2O3+SO2+SO3
2FeSO4--------Fe2O3+SO2+SO3
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