The pH scale measures the acidity or alkalinity of a solution. A solution that has a pH of 7 is neutral. For each increase of 1 pH, a solution is 10 times as alkaline. For each decrease of 1 pH, a solution is 10 times as acidic.

A sample of soap has a pH of 8.8. A sample of household ammonia has a pH of 11.4.

To the nearest whole number, how many times as alkaline as the soap is the ammonia?

Select one:

a.

157 times as alkaline

b.

13 times as alkaline

c.

3 times as alkaline

d.

398 times as alkaline