Chapter 2, Problem 87AE

Interpretation Introduction

Interpretation: The $\text{pH}$ for the acidic solution of the salt is given. The value of $\text{p}{K}_{{\text{a}}_{\text{2}}}$ for the given reaction is to be determined.

Concept introduction: The acid dissociation constant $\left(K_a\right)$ is calculated by the formula,

$K_b=\frac{\text{Concentration}\text{of}\text{product}}{\text{concentration}\text{of}\text{reactant}}$

The value of $\text{p}{K}_{\text{b}}$ is calculated by the formula,

$\text{p}{K}_{\text{b}}=-\log \left[K_{\text{b}}\right]$

To determine: The correct option for the value of $\text{p}{K}_{{\text{a}}_{\text{2}}}$ for the given reaction