1.write balanced chemical equation:
a. ferrous sulphate decomposes to form ferric oxide, sulphur dioxide and sulphur trioxide
b. Sodium chloride + concentrated sulphuric acid + manganese dioxide -> sodium hydrogen sulphate + manganese sulphate + water + chlorine
a. 2FeSO4 -> Fe2O3 + SO2 + SO3
b. 2NaCl + 3H2SO4 + MnO2 -> 2NaHSO4 + MnSO4 + 2H2O + Cl2