Chapter 15, Problem 56E

Interpretation Introduction

Interpretation: The concentration and volume of $\text{Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}},\text{KCl}$ and solubility product of ${\text{PbCl}}_{\text{2}}$ is given. The equilibrium concentration of ${\text{Pb}}^{\text{2}+}$ and ${\text{Cl}}^{-}$ is to be calculated.

Concept introduction: The formation of solid in a solution is known as precipitation.

Solubility product, $K_{\text{sp}}$ is defined as the concentration of ions in a saturated solution where each ion is raised to the power of their coefficients. Ion product, $Q$ is defined as the initial concentration of ions in any solution where each ion is raised to the power of their coefficients.

The relation between ion product, $Q$ and solubility product, $K_{\text{sp}}$ is as follows.

• If $K_{\text{sp}}>Q$, then no precipitate will form.
• If $K_{\text{sp}}<Q$, then precipitate will form.
• If $K_{\text{sp}}=Q$, then the solution will be in just saturation.