Chapter 10.5, Problem 4QQ

Interpretation Introduction

Interpretation:

From the given option, the correct option for the given statement has to be found.

Concept Introduction:

Strong acid:

In strong acids, the ionization of acid is complete.  This implies that the concentration of the hydrogen ion or hydronium ion will be equal to the initial concentration of the acid at equilibrium.

Weak acid:

Complete ionization will not occur in weak acid.  The strength of the weak acid is depends on how much it dissociates.

Acid Ionization Constant:

An acid ionization constant is equilibrium constant for the reaction of a weak acid with water:

Consider a general equation:

    ${\text{HA(aq) + H}}_{\text{2}}\text{O(l) }\underset{\underset{}{\leftharpoondown }}{\overset{}{\rightharpoonup }}{\text{ H}}_{\text{3}}{\text{O}}^{\text{+}}{\text{(aq) + A}}^{\text{-}}\text{(aq)}$

The acid ionization constant:

    ${\text{K}}_{\text{a}}\text{ = }\frac{{\text{[H}}_{\text{3}}{\text{O}}^{\text{+}}{\text{][A}}^{\text{-}}\text{]}}{\text{[HA]}}$

Concentration of water is not included because water is a pure liquid.