Chapter 16, Problem 120IP

Interpretation Introduction

Interpretation: The reaction between $\text{B}$ and ${\text{H}}_{\text{2}}\text{O}$, the value of $\Delta H°,\Delta S°$ and volume of the weak base $\text{B}$ is given. The $\text{pH}$ value of this weak base is to be calculated at a given temperature.

Concept introduction: The expression for free energy change is,

$\Delta G°=\Delta H°-T\Delta S°=-RT\ln \left(K_{\text{b}}\right)$

The relation between $\text{pH}$ and $\text{pOH}$ is,

$\text{pH}+\text{pOH}=\text{14}$