Chapter 9.5, Problem 11PPC

Interpretation Introduction

Interpretation:

The best representation diagram for the plot of pH (vs) volume of acid added in water should be given.

Concept introduction:

$\text{pH}$:

The Negative logarithm of base $\text{10}$ Hydrogen ion concentration is known as $\text{pH}\text{.}$

$\text{pH}\text{=}{\text{-log}}_{\text{10}}{\text{[H}}^{\text{+}}\text{]}$

• Acidity of a solution is normally given by $\text{pH}$ in chemistry and it gives information about the concentration of hydrogen ion in solution and it is,

  $\begin{array}{l}{\text{H}}_{\text{2}}\text{O}\to {\text{H}}^{\text{+}}{\text{+OH}}^{\text{-}}\\ {\text{K}}_{\text{w}}\text{=}{\text{[H}}^{\text{+}}{\text{][OH}}^{\text{-}}\text{]}\\ {\text{K}}_{\text{w}}\text{=}{\text{10}}^{\text{-14}}\\ {\text{K}}_{\text{w}}\text{=}{\text{K}}_{\text{a}}{\text{+K}}_{\text{b}}\\ {\text{K}}_{\text{a}}\text{=}{\text{K}}_{\text{w}}{\text{-K}}_{\text{b}}\\ {\text{K}}_{\text{b}}\text{=}{\text{K}}_{\text{w}}{\text{-K}}_{\text{a}}\\ \text{pH}\text{=}\text{0-14}\end{array}$

• $\text{pH}$ of the solutions are $\text{pH}\text{=}\text{0-7}$ and basic solutions are $\text{pH}\text{=}7\text{-14}$ so 7 is a neutral range water is having $\text{pH}\text{=}7$