One liter of a solution of pH 4 has how many more hydrogen ions (H+) than 1 L of a solution of pH 9?

Question

Quizplus · Accepted Answer

The pH scale is logarithmic, meaning that a solution with a pH of 4 has 10 times more hydrogen ions than a solution with a pH of 5, and 100 times more hydrogen ions than a solution with a pH of 6, and so on. Thus, a solution with a pH of 4 has 10,000 times more hydrogen ions than a solution with a pH of 9 (10^(-4) versus 10^(-9)), which means that one liter of a solution of pH 4 has 100,000 times more hydrogen ions than one liter of a solution of pH 9. Therefore, the answer is E.

One Liter of a Solution of PH 4 Has How