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

Multiple Choice

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