The Use of pH-logc i Diagrams for the Construction of Titration Diagrams

Abstract

Diagrams displaying acid–base titrations should show the pH on the y-axis as a function of the advancement of the titration. The advancement of titration can be given by the added volume of titrator. However, using the volume of added titrator on the x-axis, each titration would need a different x-axis. To avoid this, one likes to use a normation, which is possible by calculating a so-called “degree of titration” τ (lower case Greek letter “tau”). The degree of titration can be defined as follows:$$ \tau =\frac{{\mathrm{ added}\ \mathrm{ amount}\ \mathrm{ of}\ \mathrm{ titrator}\ [\mathrm{ in}\ \mathrm{ mol}]}}{{\mathrm{ amount}\ \mathrm{ of}\ \mathrm{ titrator}\ [\mathrm{ in}\ \mathrm{ mol}]\ \mathrm{ which}\ \mathrm{ is}\ \mathrm{ necessary}\ \mathrm{ to}\ \mathrm{ reach}\ \mathrm{ the}\ \mathrm{ equivalence}\ \mathrm{ point}}}. $$