Give the full ionic equation and net ionic reaction for Ba(NO3)2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaNO3 (aq)

The full ionic equation describes the components as individual ions, as this is how they exist in aqueous solution. Ba²⁺ + 2 NO^3- + 2 Na⁺ + SO₄^2- → BaSO₄ (s) + 2 Na⁺ + 2 NO^3-
To obtain the net ionic equation, remove all ions present on both sides of the equations (i.e: 2 Na⁺  and 2 NO^3- )This gives the net ionic equation: Ba²⁺ + SO₄^2- → BaSO₄ (s) (BaSO₄ is insoluble in water because of the interactions between +2 and -2 charges on the ions)