Chemistry - the Complete Course Series, teaches students quantitative reasoning to solve chemistry problems. The 30 volume series covers all aspects of Chemistry from density to the mole, to molarity, stoichiometry and equilibrium. It demonstrates how to ask meaningful questions and conduct careful investigations to build knowledge of chemical and physical concepts and develop the skills to solve mathematical and scientific problems. In this program we continue with our study of the meaning and usefulness of the concept of pH. An introductory problem is worked involving finding the concentrations of H+, OH, OH-, the pH and the pOH in a solution of a strong acid. This volume teaches a strong acid or base is defined as an acid or base that is 100% ionized in solution. It is quite common to confuse the term strength with concentration. The sum of the pH and the pOH of a solution equals 14. Sulfuric acid ionizes one H + at a time, and is a strong acid only for the first ionization.