Principle

Acid-base titration represents an analytical procedure for determining concentrations of corresponding compounds. The use of pH measuring electrodes also offers the possibility of generating measurement curves. Potentiometric titrations represent two fundamental laws, the law of mass action (MWG) and Nernst's equation.

In this experiment, students record a trace for the titration of a polyvalent acid (phosphoric acid) with a strong base (sodium hydroxide solution). They then identify the characteristic features of such a titration curve and determine the equivalence points.

Benefits

• Experiment is part of a complete solution with numerous experiments from the field of titration and ion detection, simple structure of a teaching series

• In addition to the graphical display of the measured data on the measuring instrument, all data can also be transferred to a computer for evaluation

• Experimental literature available for students and teachers: minimum preparation time
• Risk assessment available for students and teachers
• Easy teaching and efficient learning when using the available interactive experimental literature