I am having big troubles on this question.

What is the increase in acidity associated with a decrease of one unit on the pH scale?

3 answers

A factor of 10.
Concn 0.1 M acidity = 10^-1 & pH = 1
Concn 0.01 M acidiity = 10^-2 & pH = 2
Concn 0.001 M acidity = 10^-3 & pH = 3
SO one unit as well? I don't really get it.
If I understand your response, absolutely not. When the acidity changes by 10, the pH changes by 1. That's what I wrote. Or said another way, when the pH decreases by 1 unit, the acidity increases by 10 units.