(a) Write the balanced equations for the preparation of the following compounds (as the major product), starting from iron and using only one other substance:
(i) iron (II) chloride
(ii) iron (III) chloride
(iii) iron (II) sulphate
(iv) iron (II) sulphide
(b) Write the equations for the laboratory preparation of
(i) sodium sulphate using dilute sulphuric acid.
(ii) lead sulphate using dilute sulphuric acid.