Acid–base logarithmic diagrams with computer algebra systems

The pH of any polyprotic weak and strong acid (or base) can be calculated employing the logarithmic concentration diagram. The aim of this text is to introduce a joint approach of algebraic, as used in textbook, and graphical method. The logarithmic diagrams provide an easy insight into the acid–base systems. The mathematical complexities are overtaken using a Computer Algebra System program, which is also exploited to draw the dia- grams. Examples of the use of the program are given together with the code employed.