Example of pH:

Example:    The hydrogen focus, [H⁺], of a solution is 4.8 x 10^-8 moles/liter.  What is the pH of the solution?

Solution:  pH = -log [H⁺]

                          = -log (4.8 × 10^-8)

                             = 7.32

Example:    The pH of a solution is 3.83.   What is the hydrogen concentration of the solution?

Solution: [H⁺] = 10-pH

                        = 10-3.83 moles/liter

                        = 1.48 × 10-4 moles/liter