Chapter 15, Problem 64QAP

Interpretation Introduction

Interpretation:

The amount of precipitate of ${\text{CaC}}_{\text{2}}{\text{O}}_{\text{4}}$, when the solution is cooled to $25°\text{C}$ needs to be determined.

Concept introduction:

Equilibrium reaction in the solution of calcium oxalate can be shown as follows:

${\text{CaC}}_{\text{2}}{\text{O}}_{\text{4}}\left(\text{s}\right)\rightleftharpoons {\text{Ca}}^{\text{2+}}\left(\text{aq}\right)+{\text{C}}_{\text{2}}{\text{O}}_{\text{4}}{}^{2-}\left(\text{aq}\right)$

$K_{sp}=s^2$

Where, s is the solubility of ${\text{CaC}}_{\text{2}}{\text{O}}_{\text{4}}$ in mol/L

$s=\sqrt{K_{sp}}$