Chapter 14, Problem 30QRT

Interpretation Introduction

Interpretation:

For solution of benzyl amine having hydroxide ion concentration of $2.4\times {10}^{-3}\text{M}$, $\text{pH}$ and $\text{pOH}$ has to be calculated.

Concept Introduction:

A solution can be said to be acidic or basic by looking into the $\text{pH}$ value of the solution.  $\text{pH}$ of the solution is defined as the negative of base 10 logarithm of the hydronium ion concentration.  This can be expressed in the form of equation as,

    $\text{pH}=-\log [{\text{H}}_{\text{3}}{\text{O}}^{+}]$

This can also be expressed in terms of hydroxide ion concentration.  $\text{pOH}$ of the solution is defined as the negative of base 10 logarithm of the hydroxide ion concentration.  This can be expressed in the form of equation as,

  $\text{pOH}=-\log [{\text{OH}}^{-}]$

Relationship between $\text{pH}$ and $\text{pOH}$ can be given as,

    $\text{pH}+\text{pOH}=14.0$

If one value is known, the other can be calculated using simple mathematics.