Original scientific paper

Stability Constants of Cadmium Chloride Complexes in (10, 30 and 50 Mass per Cent) Acetone-Water Mixtures from Electromotive Force Measurements

Marija Vìšić ; Faculty of Natural Sciences and Arts, University of Split, Teslina 12, 21000 Split, Croatia
Ivica Mekjavić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, Teslina 10, 21000 Split, Croatia

Abstract

Stability constants (K'n) were determined, using the potentiometric
method, of different cadmium chloride complexes at different ionic
strengths in 10 mass per cent acetone-water mixture at 288.15, 298.15 and 313.15 K, and in 30 and 50 mass per cent at 288.15,
298.15 and 308.15 K, respectively. These values were used to establish the thermodynamic stability constants (K°) of [CdCl]+,
[CdCl, and [CdCl]- complexes in 10 mass per cent mixture acetone, as well as in other mixtures also of the [CdCl4]2- complex. On the basis of the temperature dependence for K°, thermodynamic quantities were calculated for reactions forming these complexes; the results obtained indicate that the reactions are endothermic and that they result in an increase in entropy. The values obtained for K,° and thermodynamic quantities were compared with analogous data in 2-propanol-water mixtures.

Keywords

Hrčak ID:

135941

URI

https://hrcak.srce.hr/135941

Publication date:

4.3.1996.

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