Collect. Czech. Chem. Commun. 1985, 50, 2670-2678

Effect of medium on dissociation of carboxylic acids

Jiří Mollina, Zdeněk Pavelekb, Jitka Navrátilováa and Alena Recmanováa

a Department of Inorganic and Physical Chemistry, Palacký University, 771 46 Olomouc
b Research and Development Basis, Galena, 747 70 Opava


pK Values of carboxylic acids have been measured in mixtures water-organic solvent and confronted with the Born equation. Solubilities of benzoic acid have been measured. From the pK and solubilities found the ΔGt0(C6H5COO-) values have been calculated for various two-component solvents. The results agree with the idea that the ion transfer into another medium is affected not only by electrostatic, but also by non-electrostatic forces.