Abstract
A direct potentiometric method for the determination of acid-base constants of protolytes in nonaqueous solvent is proposed. The method is based on the treatment of the data of a single potentiometric titration of a base or an acid in nonaqueous solvent. The titration is performed in a galvanic cell consisting of a glass and a silver-silver chloride electrode with liquid junction. Two alternatives are proposed by which at first, only the acid or only the base constant is directly determined. By the second alternative the acid, the base as well as the autoprotolysis constant are determined simultaneously from a single experiment. The method is checked with the determination of some acid-base constants in water as well as in some mixed water-alcoholic mixtures. The constants obtained coincide relatively well with the data of other investigators.
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