A solution contains the ions Ag⁺, Pb²⁺, and Ni²⁺. Dilute solutions of NaCl, Na₂SO₄, and Na₂S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order? A) Na₂S, NaCl, Na₂SO₄ B) Na₂SO₄, NaCl, Na₂S C) Na₂SO₄, Na₂S, NaCl D) NaCl, Na₂S, Na₂SO₄ E) NaCl, Na₂SO₄, Na₂S

Question

Quizplus · Accepted Answer

The goal is to separate the three positive ions from each other. First, we will use Na₂SO₄ to precipitate out the lead ion as Pb²⁺. Next, we will add NaCl to the solution to bring out the silver ion as AgCl. Finally, we will use Na₂S to precipitate out the nickel ion as Ni²⁺. Therefore, the correct order is Na₂SO₄, NaCl, Na₂S.

A Solution Contains the Ions Ag+, Pb2+, and Ni2+

A Solution Contains the Ions Ag⁺, Pb²⁺, and Ni²⁺