Chapter 8, Problem 8.50QP

(a)

Interpretation Introduction

Interpretation:

The concentration of hydroxide ion in an aqueous solution has to be calculated.

Concept Introduction:

Self-Ionization of water:  Self-ionization is the process in which transfer of a proton from one water molecule to another occurs, which results in formation of hydronium ion and hydroxide ion.

    $\begin{array}{l}{\text{H}}_{\text{2}}{\text{O}}_{\text{(l) }}{\text{+ H}}_{\text{2}}{\text{O}}_{\text{(l)}}\to {\text{H}}_{\text{3}}{\text{O}}^{\text{+}}{}_{\text{(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}\\ \\ {\text{K}}_{\text{w}}{\text{ = [H}}_{\text{3}}{\text{O}}^{\text{+}}{\text{][OH}}^{\text{-}}\text{]}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The concentration of hydroxide ion in an aqueous solution has to be calculated.

Concept Introduction:

Self-Ionization of water:  Self-ionization is the process in which transfer of a proton from one water molecule to another occurs, which results in formation of hydronium ion and hydroxide ion.

    $\begin{array}{l}{\text{H}}_{\text{2}}{\text{O}}_{\text{(l) }}{\text{+ H}}_{\text{2}}{\text{O}}_{\text{(l)}}\to {\text{H}}_{\text{3}}{\text{O}}^{\text{+}}{}_{\text{(aq)}}{\text{ + OH}}^{\text{-}}{}_{\text{(aq)}}\\ \\ {\text{K}}_{\text{w}}{\text{ = [H}}_{\text{3}}{\text{O}}^{\text{+}}{\text{][OH}}^{\text{-}}\text{]}\end{array}$