Combining aqueous solutions of BaI₂ and Na₂SO₄ affords a precipitate of BaSO₄. Which ion(s)is/are spectator ions in the reaction? A)Ba²⁺ only B)Na⁺ only C)Ba²⁺ and SO₄^2- D)Na⁺ and I^- E)SO₄^2- and I^-

Question

Quizplus · Accepted Answer

In the reaction, BaI₂ is being combined with Na₂SO₄, which suggests that Ba2+ and I- ions will react with S2- and form BaS and Na+ ions will react with I- ions and form NaI. The NaI that is formed as a product stays in solution and does not react to form any precipitate. Thus, Na+ and I- ions are spectator ions in the reaction. On the other hand, Ba2+ and S2- ions react to form BaS and the sulfate ion SO42- that is left as a spectator ion in the reaction. Therefore, the best choice is D as it includes the spectator ions in the solution which are Na+ and I-.

Combining Aqueous Solutions of BaI2 and Na2SO4 Affords a Precipitate

Combining Aqueous Solutions of BaI₂ and Na₂SO₄ Affords a Precipitate