How many times more acidic is a solution with a pH of 3 than a solution with a pH of 6?
A)3
B)10
C)1000
D)36
E)63

Question

Quizplus · Accepted Answer

The pH scale is logarithmic, meaning that a decrease of one pH unit represents a 10-fold increase in acidity. Therefore, a solution with a pH of 3 is 10^(3-6)=10^(-3) times more acidic than a solution with a pH of 6. Simplifying, 10^(-3) can be written as 1/1000, so the solution with a pH of 3 is 1000 times more acidic than the solution with a pH of 6. The answer is (C) 1000.

How Many Times More Acidic Is a Solution with a PH