What is the complete ionic equation of BaCI2(aq) + Na2SO4(aq) > BaSO4(s) + 2NaCI(aq)

Answer 1

well
Cl- has one extra electron
Ba++ is missing 2 electrons (so you need 2 Cl- ions for every Ba++)
Na+ is missing one electron
SO4-- Has 2 extra electrons

Answer 2

Ba^++(aq) + 2CI^-(aq) + 2Na^+(aq) + [SO4]^2-(aq) > BaSO4(s) + 2Na^+(aq)+ 2CI^-(aq)