Chapter 19, Problem 61A

Interpretation Introduction

Interpretation : The expression for the pH of a solution is to be determined.

Concept Introduction : The negative logarithm of the concentration of hydrogen ions is the pH of a solution. The values from 0 to 14 are the range of a pH scale.

Answer to Problem 61A

The pH of a solution is calculated by the following formula:

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

Explanation of Solution

Acidic solutions have pH values below 7.0.

A pH of 7.0 indicates a neutral solution.

ph greater than 7.0 designates a basic solution.

The formula to calculate pH is given as

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

Here, ${\text{H}}^{\text{+}}$ denotes the concentration of hydrogen ion.

The pH is less than 7.0 if the hydrogen ion concentration is larger than $\text{1}\text{.0}\times {\text{10}}^{-7}\text{M}$ .

The pH is greater than 7.0 if the concentration of hydroxide is less than $\text{1}\text{.0}\times {\text{10}}^{-7}\text{M}$ .