What’s the molecular equation and net ionic equation?

Question

Complete and balance the molecular equation for the reaction of aqueous sodium sulfate, Na₂SO₄, and aqueous barium nitrate, Ba(NO₃)₂.

Answer 1

Na₂SO₄(aq) + Ba(NO₃)₂(aq) ===> 2NaNO₃(aq) + BaSO₄(s) ... molecular equation. You must know or look up the solubilities of the products, especially that BaSO₄ is insoluble.

Net ionic: Ba²⁺(aq) + SO₄^2-(aq) ==> BaSO₄(s). The Na⁺ and NO3^- ions are spectators.