Thermodynamics of Lead(II) Halide Complex Formation in Calcium Nitrate Tetrahydrate -Acetamide Melts

Author:

Gadzuric S. B.1,Zsigrai I. J.1,Nikolic R. M.2

Affiliation:

1. Institute of Chemistry, Faculty of Science, University of Novi Sad, Trg D. Obradovica 3, 21000 Novi Sad, Yugoslavia

2. Institute of Nuclear Sciences “Vinca”, PO Box 522, 11000 Belgrade, Yugoslavia

Abstract

Abstract The complex formation between lead(II) ions and chloride and bromide ions in melts of C a(N 03) 2 • 4 H2O • αCH3CONH2 has been studied at different temperatures between 30 and 70 °C. The formation constants of the complexes PbX+ and PbX2 (X = Cl, Br) were determined from em f measurements by means of Ag/AgX electrodes. The dependence of the formation constants for PbCl+ on the solvent melt composition has been analysed. The thermodynamic parameters ΔH0 11 and ΔS0 11 for PbX+ complex formation have been estimated. The parameters are compared with the literature data for the same process in dilute aqueous solutions and in some hydrated and anhydrous salt melts.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

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