22. ph is a measure of
a. hydrogen ion concentration. c. hydroxide ion concentration.
b. hydrogen gas concentration. d. hydrolysis.

Option (a) is the correct answer.

Explanation:

pH is the measure of concentration of hydrogen ions present in a solution.

Mathematically,        pH = -

where         = concentration of hydrogen ions

More is the concentration of hydrogen ions present in a solution, less will be the value of pH. Hence, more will be the acidic nature of the solution.

Thus, we can conclude that pH is a measure of hydrogen ion concentration.

- decrease the number of plants and animals living in the water.