Chapter 10, Problem 10.27P

Interpretation Introduction

Interpretation:

The fraction in the form ${\text{A}}^{\text{-}}\text{ , HA}$ and the fraction of the quotient $\frac{\left[{\text{A}}^{\text{-}}\right]}{\left[\text{HA}\right]}$ at given $\text{pH}$ has to be calculated.

Concept introduction:

Fractional Composition Equations:

The fraction of an acid has to be an expression form ( ${\text{A}}^{\text{-}}\text{ and HA}$) as a fraction of $\text{pH}$

$\text{HA}\underset{{\text{K}}_{\text{a}}}{\rightleftharpoons }{\text{H}}^{\text{+}}{\text{+A}}^{\text{-}}$

${\text{K}}_{\text{a}}\text{=}\frac{\left[{\text{H}}^{\text{+}}\right]\left[{\text{A}}^{\text{-}}\right]}{\text{HA}}$