Original scientific paper

Thermodynamics of the Cell: Cd(Hg)_satd.|CdCl₂(m)|AgCl|Ag in (10, 30 and 50 Mass per Cent) 2-Propanol-Water Mixtures

M. Višić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, 58000 Split, Teslina 10, Croatia
I. Mekjavić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, 58000 Split, Teslina 10, Croatia

Abstract

The e.m.f. of the cell: Cd(Hg)satd. | CdC^m) |AgCl|Ag in 2-propanol- water mixtures (containing 10, 30 and 50 mass per cent 2-propanol) was measured in the temperature range 293.15 K • • • 313.15 K at 5 K intervals and in the range of molality of CdCl2 0.002 < m/mol kg-1 < 0.02. The measured values were processed in order to obtain the standard e.m.f. of the cell for each temperature by (a) using the literature values for the stability constants of all Cd chlorido complexes and (b) assuming that only the CdCl+ complex was present in the solution. The values obtained by both methods were compared and discussed. The values obtained by the first method were used to calculate the standard thermodynamic quantities for the cell reaction and the mean activity coefficients of CdCl2. The standard thermodynamic quantities for CdCl2 transfer from water to the investigated 2-propanol- water mixtures were also calculated. These values were compared with those obtained for the transfer of electrolytes HC1, HBr and HI to the same mixtures.

Keywords

Hrčak ID:

137049

URI

https://hrcak.srce.hr/137049

Publication date:

1.3.1994.

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