Chapter 14, Problem 102E

Interpretation Introduction

Interpretation:

For each of the given solution, the $\text{pH}$ of the solution is to be determined from the given concentration of ${\text{OH}}^{-}$ ions and based on the $\text{pH}$ value, each solution is to be classified as acidic, basic, or neutral.

Concept introduction:

The $\text{pOH}$ of a given solution is expressed as follows:

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

The sum of $\text{pH}$ and $\text{pOH}$ in a solution is always equal to a constant at a constant temperature. At $25°\text{C}$, the sum is equal to 14.00 and it can be shown mathematically as

$\text{pH}+\text{pOH}=\text{14}\text{.0}$

The $\text{pH}$ scale is used to classify the solution as follows:

The solution having pH value less than 7 is acidic.

The solution having pH value greater than 7 is basic.

If the solution has pH equal to 7, then it is neutral.