ABSTRACT

An acid-base titration is an extremely useful experimental method for determining the pKa and also the amount of an unknown acid or base in solution. In an acid-base titration, the pH of the solution is measured, generally with a glass electrode (see Topic E5), as reaction between an acid and a base occurs. This is achieved by using an acid solution and a base solution and adding one to the other. The solution that is added is called the titrant solution; this is added to the analyte solution, and the whole process is called titration. Generally the titrant is a strong acid or a strong base as appropriate. The results are plotted as the pH of the solution versus the volume of titrant added, called a pH titration curve.