The pH of coffee is 5.6.The pH of grapefruit juice is 2.6.This means that the proton concentration in coffee is

Question

Quizplus · Accepted Answer

The pH scale is logarithmic, meaning that for every one unit decrease in pH, there is a ten-fold increase in proton concentration. Therefore, the difference in pH between coffee (pH 5.6) and grapefruit juice (pH 2.6) is 3 units. This means that the proton concentration in grapefruit juice is 10^3 (1,000) times higher than in coffee. Thus, the correct answer is B: a thousand times lower than in grapefruit juice.

The PH of Coffee Is 5