Chapter 15, Problem 6RQ

Interpretation Introduction

Interpretation: The definition of selective precipitation is to be stated. The concentration of ${\text{Mg}}^{\text{2}+},{\text{Ca}}^{\text{2}+}$ and ${\text{Ba}}^{\text{2}+}$ is given. The order of appearance of precipitate is to be stated when $\text{NaF}$ is added to these ions. The concentration of ${\text{Ag}}^{+},{\text{Pb}}^{\text{2}+}$ and ${\text{Sr}}^{\text{2}+}$ is given. The order of appearance of precipitate is to be stated when ${\text{K}}_{\text{3}}{\text{PO}}_{\text{4}}$ is added to these ions.

Concept introduction: Separation of mixtures of metal ions in aqueous solution using a reagent is known as selective precipitation.