Based upon the solubility rules which of the following combinations of metal ions could be separated by addition of Cl- ions to a solution which is ~0.10 M in each metal ion

Question

select one or more:

a. Al³⁺ and Sc³⁺

b. Ca²⁺ and Pb²⁺

c. Mg²⁺ and Sr²⁺

d. K⁺ and Ag⁺

Answer 1

b. Ca²⁺ and Pb²⁺ The Pb²⁺ will precipitate but Ca²⁺ will remain in solution

d. K⁺ and Ag⁺ The Ag⁺ will precipitate but the K⁺ will remain in solution