Chapter 14.5, Problem 14.11CE

(a)

Interpretation Introduction

Interpretation:

Using the given $K_a$ value for lactic acid and pyruvic acid, which is stronger acid has to be identified.

(b)

Interpretation Introduction

Interpretation:

Using the given $K_a$ value for lactic acid and pyruvic acid, in which acid ionization is more reactant favored has to be identified.

Concept Introduction:

Acid ionization constant${\text{K}}_{\text{a}}$:

The equilibrium expression for the reaction ${\text{HA}}_{(aq)}\stackrel{}{\to }{\text{H}}^{+}{}_{(aq)}+{\text{A}}^{\text{-}}{}_{(aq)}$ is given below.

$K_a=\frac{[{\text{H}}^{\text{+}}{\text{][A}}^{\text{-}}\text{]}}{[\text{HA]}}$

Where $K_a$ acid ionization is constant, $[{\text{H}}^{\text{+}}\text{]}$ is concentration of hydrogen ion, $[{\text{A}}^{\text{-}}\text{]}$ is concentration of acid anion, $[\text{HA]}$ is concentration of the acid.