Chapter 16.10, Problem 18PE

(a)

Interpretation Introduction

To determine: If barium fluoride and calcium fluoride are slightly soluble salt.

Interpretation: The validation of the fact that barium fluoride and calcium fluoride are slightly soluble salt is to be stated.

Concept introduction: In the solution of slightly soluble salt, equilibrium is established between the salt in the solid form and its ions in the solution.

The equilibrium constant slightly soluble salt is known as the solubility product and denoted by $K_{\text{sp}}$.

(b)

Interpretation Introduction

To determine: If ${\text{Ba}}^{2+}$ and ${\text{Ca}}^{2+}$ ions in the solution is completely separated by selective precipitation with ${\text{F}}^{-}$ ions.

Interpretation: The validation of the fact that ${\text{Ba}}^{2+}$ and ${\text{Ca}}^{2+}$ ions in the solution is completely separated by selective precipitation with ${\text{F}}^{-}$ ions is to be stated.

Concept introduction: Complete precipitation is defined as less than $0.10\%$ of a particular ion left in the solution.

The value of $K_{\text{sp}}$ determines the solubility of a salt.