Chapter 8, Problem 8.21P

Interpretation Introduction

Interpretation:

The ${\text{pK}}_{\text{a}}$ value of given $\text{0}\text{.100M HA}$, weak acid solution has to be calculated.

Concept Introduction:

Acid dissociation constant ${\text{K}}_{\text{a}}$ represents how strong the acid is in a solution.

  $p{K}_a=-\log K_a$

The strength of acid decreases as the value of $p{K}_a$ increases

$\text{pH}$: The concentration of hydrogen ion is measured using $\text{pH}$ scale. The $\text{pH}$ of a solution is a figure that expresses the acidity or the alkalinity of a given solution.

It is defined as the negative base-10 logarithm of the hydrogen or hydronium ion concentration.

  $\text{pH}\text{=}{\text{-log[H}}_{\text{3}}{\text{O}}^{\text{+}}\text{]}$