Combining aqueous solutions of BaI₂ and Na₂SO₄affords a precipitate of BaSO₄.Which ions 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, Ba2+ and S2- ions combine to form BaS, which is insoluble in water and hence precipitates. Na+ and I- ions do not react with each other, and remain in solution. Therefore, they are the spectator ions in the reaction. The only choice that includes Na+ and I- ions as spectator ions is D: Na+ and I- ions are the only spectator ions in the reaction.

Combining Aqueous Solutions of BaI2 and Na2SO4 affords a Precipitate

Combining Aqueous Solutions of BaI₂ and Na₂SO₄affords a Precipitate