Chapter 19.2, Problem 20LC

Interpretation Introduction

Interpretation : The methods used to measure the pH of a solution are to be listed.

Concept Introduction : The negative logarithm of the concentration of hydrogen ions is the pH of a solution. The formula to calculate pH is given as:

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

Answer to Problem 20LC

The methods used to measure the pH of a solution are pH meters and acid-base indicators.

Explanation of Solution

The pH knowledge is very useful for the reaction.

Acid-base indicators and pH meters are the two methods used to measure pH.

An acid or a base that dissociates in a certain pH range can be used as an indicator in the acid-base indicator method.

Low pH and high hydrogen ion concentration favor the indicator's acid form.

When the hydroxide ion concentration is high and the pH is high, the basic form predominates.

To detect pH quickly and continuously, a pH meter is employed.

Compared to liquid indicators or indicator strips, it could be simpler to operate.