Thermodynamics of Re-Solvation of Cadmium Ions in Water-Acetone Solvents

Author： Chankina T.   Parfenyuk V.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1023-1935

Source： Russian Journal of Electrochemistry, Vol.41, Iss.10, 2005-10, pp. : 1077-1081

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Abstract

On the basis of a method of differences of Volta-potentials at 298.15 K the real primary effect of an environment of cadmium ions and the real Gibbs energy for the transport of Cd2+ out of water into a water-acetone solvent (Me2CO) are determined. The surface potential at the nonaqueous solvent/gas phase interface $$\Delta \chi _{H_2 O}^S$$ is obtained. This quantity is taken into account when calculating chemical thermodynamic characteristics for cadmium ions and the surface potential at the gas phase/acetone interface $$\Delta \chi ^{\operatorname{Me} _2 \operatorname{O} } = - 0.337\operatorname{V}$$ . Thermodynamic characteristics of the over-solvation of a II-I electrolyte with those for a I-I electrolyte are compared.

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