Viscosimetric studies of aqueous solutions of dicarboxylic acids

A method of analysis of viscosimetric data of weak electrolytes of 1-2 type has been elaborated. For this purpose, the precise measurements of density and viscosity of aqueous solutions of dicarboxylic acids (oxalic, malonic, succinic, glutaric, adipic, pimelic, DL-tartaric, DL-malic, maleic, fumaric and o-phthalic) have been conducted at 298.15 K. Modified Jones-Dole equations taking into account all chemical species existing in the solution as well as the phenomenon of dimerization of dicarboxylic acids have been proposed. The values of coefficients of the modified equations (A, B-o, B-D) have been determined. It has been shown that linear correlations exist between values of B coefficients and between them and the number of carbon atoms in the hydrocarbon part of acids coming from the same homologous series. (c) 2007 Elsevier B.V. All rights reserved.