EXPLAIN THE CHEMICAL COMPOSITION OF BOTH SIDE OF THE EQUATION BELOW

3CaSO4+2ALCL3= 3CaCL2+AL2(SO4)3

3 moles CaSO4 react with 2 moles AlCl3 (notice it isn't ALCL3) yielding 3 moles CaCl2 (not CaCL2) and 2 moles Al2(SO4)3 [not AL2(SO4)3]