Translate the following statements into chemical equations and then balance it.
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
BaCl2 + Al2(SO4)3 ? AlCl3 + BaSO4
3BaCl2 + Al2(SO4)3 → 2 AlCl3 + 3BaSO4
BaCl2 + AlSO4 ? AlCl2 + BaSO4
BaCl3 + Al(SO4)3 → AlCl3 + Ba(SO4)3