Definition of pH
pH can be viewed as an abbreviation for power of hydrogen or more completely, power of the concentration of hydrogen ion.
The mathematical definition of pH is a bit less intuitive, but with a calculator in hand, more useful. It says that the pH is equal to the negative log of the hydrogen ion concentration, or pH = -log [H+]. Using the Brønsted-Lowry approach that would be pH = -log [H3O+]. We'll come back to this definition when we start calculating pH values.
E-mail instructor: Eden Francis
Clackamas Community College