A solution with a pH of 11.7 is ________ times more basic (alkaline) than a solution with a pH of 8.7.
A) 10
B) 100
C) 1000
D) 3

Question

Quizplus · Accepted Answer

The pH scale is logarithmic, so a difference of 3 pH units represents a 1000-fold difference in acidity/basicity. Therefore, a solution with a pH of 11.7 is 1000 times more basic than a solution with a pH of 8.7. Choice C) is the only option that represents this correct factor of 1000.

A Solution with a PH of 11