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The acid-base titration is an analytical method to determine the concentration of an acid or base in aqueous solutions by neutralizing the acid/base in solution by a basic/acidic reagent. The endpoint of the solution depends on the relative strengths of the used acids and bases. A neutral solution will be obtained only if a strong acid reacts with a strong base, any other combination will shift the endpoint either towards the acidic direction (lower pH values) or more basic solutions (pH values above 7.0). Thus the endpoint of a titration must be indicated by a proper acid-base indicator whose color changes at the pH value of interest.

English version [774 kB]
After downloading please unpack all files of
the zipped packages and start the executable.
The program TITRATION allows to select from a large set of acids and bases, and a set of 20 pH indicators ranging from picric acid (pH 1) to indigo carmine (pH 13). After selecting the acid and base of interest and a proper indicator, the titration curve and the color change of the indicator can be calculated.
Many thanks to Ihor Patsay, Ivan Franko National University of Líviv, Ukraine, who contributed the acid-base titration simulation to the Learning by Simulations Web site.

Last Update: 2008-Feb-27