Chapter 7, Problem 14DQ

Interpretation Introduction

Interpretation: ThepH values of given chemicals from pH values; 1, 2, 5, 6, 6.5, 8, 11, 11, 13 needs to be matched.

HBr, HF, HCN, ${\text{CH}}_{\text{3}}{\text{NH}}_{\text{3}}\text{F}$ , ${\text{NH}}_4\text{F}$ , $\text{NaF}$ , $\text{NaCN}$ , ${\text{NH}}_3$ ,NaOH

Concept Introduction: An acid is the substance that gives H+ or ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$ ions in its aqueous solution.

  ${\text{HA}}_{\text{(aq)}}{\text{ + H}}_{\text{2}}{\text{O}}_{\text{(l) }}\stackrel{}{\to }{\text{H}}_{\text{3}}{\text{O}}^{\text{+}}{}_{\text{(aq)}}{\text{+A}}^{\text{-}}{}_{\text{(aq)}}$

On the contrary, a base gives OH- ions in its aqueous solution.

  ${\text{BOH}}_{\text{(aq)}}\rightleftharpoons {\text{B}}^{\text{+}}{}_{\text{(aq)}}{\text{+ OH}}^{\text{-}}{}_{\text{(aq)}}$

The pH scale is the range from 0 to 14 whereas 0 to 7 value indicates the acidic medium and 7 to 14 stands for basic solution.