Two separate precipitation reactions occur in the same beaker:
• Na⁺(aq) + Cl⁻(aq) + Ag⁺(aq) + NO₃⁻(aq) → Na⁺(aq) + NO₃⁻(aq) + AgCl(s)
• 2 Na⁺(aq) + SO₄²⁻(aq) + Ba²⁺(aq) + 2 NO₃⁻(aq) → 2 Na⁺(aq) + 2 NO₃⁻(aq) + BaSO₄(s)
List all ions that remain unchanged in both reactions.