Question

What would you observe when crystals of copper ( ii ) sulphate and iron ( ii ) sulphate are separately heated in two test tubes?

Answer 1

i will observe when crystals of copper sulphate and iron
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Answer 2

The blue coloured copper sulphate crystals turns white due to the loss of water molecules. The formula of copper sulphate is CuSO4.5H2O. When copper sulphate is heated, it looses water molecules and hence it looses blue colour.

On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate(FeSO4) is formed. So their colour changes from light green to white. On furtherheating, anhydrous ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).