What is the pH of a substance that has a hydrogen ion concentration of 1.2 x 10^-2 M?

The pH os the substance is 1,92.

Explanation:

The pH is a measure that gives us an idea of the acidity or alkalinity of a solution. It is calculated as:

pH = - log (H + ) = - log (1.2 x 10^-2) = 1,92

The pH scale ranges from values of 0 to 14 (less than 7.0 is acidic and greater than 7.0 is basic, a pH = 7.0 is neutral). In this case, the substance is acidic.