why on heating green coloured ferrous sulphate crystals reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced
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If ferrous sulphate is heated strongly, the following reaction takes place
2FeSO4.7H2O → Fe2O3 + SO2 + SO3.
While SO2 and SO3 evolve out as gases which is responsible for that odour of burning sulphur, the residue left is the solid - Fe2O3 (ferric oxide) - which is a reddish brown powder.
2FeSO4.7H2O → Fe2O3 + SO2 + SO3.
While SO2 and SO3 evolve out as gases which is responsible for that odour of burning sulphur, the residue left is the solid - Fe2O3 (ferric oxide) - which is a reddish brown powder.
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