Question

Is pH a measure of the hydrogen ion concentration?

Answer 1

Yes, pH is a measure of the hydrogen ion concentration.

See What is pH?.

If you know the pH, you can calculate the hydrogen ion concentration.

EXAMPLE

Calculate the hydrogen ion concentration for a solution with pH 2.30.

Solution

Since pH = -log[H⁺],

[H⁺] = `10^(-"pH")` mol/L.

So [H⁺] = `10^-2.30` mol/L = 5.0 × 10⁻³ mol/L