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A Conductivity Study of Unsymmetrical 2:1 Type “Complex Ion” Electrolyte: Cadmium Chloride in Dilute Aqueous Solutions B

Author:
Apelblat, Alexander, Esteso, Miguel A., Bešter-Rogač, Marija
Source:
The Journal of physical chemistry 2013 v.117 no.17 pp. 5241-5248
ISSN:
1520-5207
Subject:
aqueous solutions, cadmium chloride, electrolytes, equations, physical chemistry, thermodynamics
Abstract:
Systematic and precise measurements of electrical conductivities of aqueous solutions of cadmium chloride were performed in the 2 × 10–⁵ - 1 × 10–² mol·dm–³ concentration range, from 278.15 to 313.15 K. Determined conductances were interpreted in terms of molecular model which includes a mixture of two 1:1 and 2:1 electrolytes. The molar limiting conductances of λ⁰(CdCl⁺, T) and λ⁰(1/2Cd²⁺, T), the equilibrium constants of CdCl⁺ formation K(T) and the corresponding standard thermodynamic functions were evaluated using the Quint-Viallard conductivity equations, the Debye–Hückel equations for activity coefficients and the mass-action equation. An excellent agreement between calculated and experimental conductivities was reached.
Agid:
5588553