Question

Which pH change represents a hundredfold increase in the concentration of H3O+

1) 5 to 7
2) 13 to 14
3) 3 to 1
4) 4 to 3

Answer 1

The pH change of 3 to 1 represents a hundredfold increase in the concentration of H3O+.

Step-by-step explanation:

A change of one unit on the pH scale represents a change in the concentration of hydrogen ions by a factor of 10, and a change of two units represents a change in the concentration of hydrogen ions by a factor of 100. Therefore, to have a hundredfold increase, we need a change of two units on the pH scale.

Out of the given options, the pH change of 3 to 1 represents a hundredfold increase in the concentration of H3O+.