Thermodynamics of lead(II) halide complex formation in calcium nitrate tetrahydrate - Acetamide melts
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The complex formation between lead(II) ions and chloride and bromide ions in melts of Ca(NO3)(2 .) 4H(2)O . aCH(3)CONH(2) 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 emf 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 DeltaH(11)(0) and DeltaS(11)(0) 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.
Кључне речи:lead(II) halide complexes / acetamide / calcium nitrate tetrahydrate
Извор:Zeitschrift fur Naturforschung. Section A: Journal of Physical Sciences, 2001, 56, 12, 832-836
ISSN: 0932-0784 (print)