write chemical formulas of all the compounds that formed by the combination of following ions;
Ca2+, K+, Fe3+, Cl-, SO4 2-
Vaishnavi is correct for all formula except the last one:
Fe3+ and SO42- form Ferric Sulphate, Fe2(SO4)3
Fe3+ and SO42- form Ferric Sulphate, Fe2(SO4)3