An increase of 1 on the pH scale causes acidity to be multiplied by a factor of 0.1, while a decrease of 1 on the pH scale causes acidity to be multiplied by a factor of 10. If pure water has a pH of 7, how many times as acidic as pure water is a solution measuring a pH of 3?
A)10
B)100
C)1000
D)10,000

Question

Quizplus · Accepted Answer

Each decrease of 1 on the pH scale multiplies the acidity by a factor of 10. Therefore, a solution with a pH of 3 is 10,000 times as acidic as pure water (10 x 10 x 10 x 10 = 10,000).

An Increase of 1 on the PH Scale Causes Acidity