Chapter 16, Problem 16.25P

Interpretation Introduction

Interpretation:

The value of ${\text{K}}_{\text{a}}$ needs to be determined.

Concept introduction:

For dissociation reaction of a base as follows:

$\text{BOH}\rightleftharpoons {\text{B}}^{+}+{\text{OH}}^{-}$

Here, the base dissociation constant can be represented as follows:

${\text{K}}_{\text{b}}\text{=}\frac{\left[{\text{B}}^{+}\right]\left[{\text{OH}}^{-}\right]}{\left[\text{BOH}\right]}$

The relation between the acid dissociation constant and base dissociation constant is represented as follows:

${\text{K}}_{\text{a}}{\text{.K}}_{\text{b}}{\text{=K}}_{\text{W}}\text{=}{\text{1×10}}^{\text{-14}}$

Here, ${\text{K}}_{\text{W}}$ is ionic product of water.