# Hydrogen Ion Concentration Calculations Tutorial

## Key Concepts

- The hydrogen ion concentration in a solution, [H
^{+}], in mol L^{-1}, can be calculated if the pH of the solution is known. - pH is defined as the negative logarithm (to base 10) of the hydrogen ion concentration in mol L
^{-1}pH = -log

_{10}[H^{+}]

where [H^{+}] is the concentration of hydrogen ions in mol L^{-1}(mol/L or M) - [H
^{+}] in mol L^{-1}can be calculated using the equation (formula):[H

^{+}] = 10^{-pH} - As the pH increases, the concentration of hydrogen ions in the solution decreases.
As the pH decreases, the concentration of hydrogen ions in the solution increases.