Representation of Electrical Conductances by the Quint–Viallard Conductivity Equation. Part 6. Unsymmetrical 2:1 Type “Complex Ions” Electrolytes: Cadmium Bromide and Cadmium Iodide

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Abstract

Systematic and precise measurements of electrical conductivities of dilute aqueous solutions of cadmium bromide and cadmium iodide were performed from 15 to 35 °C. The conductances were interpreted in terms of a molecular model that includes a mixture of two 1:1 and 2:1 electrolytes. The molar limiting conductances of λ0(CdX+, T) ions, the equilibrium constants of formation of CdX+ complexes K(T) and the corresponding standard thermodynamic functions were evaluated using the Quint–Viallard conductance equations, the Debye–Hückel equations for activity coefficients and the mass action equations. Mathematical representations are also presented to an extension of molecular models, to the simultaneous formation of MeX+ and MeX2 species and to the possibility of hydrolysis reactions with formation of Me(OH)+ ions.

Original languageEnglish
Pages (from-to)1130-1145
Number of pages16
JournalJournal of Solution Chemistry
Volume45
Issue number8
DOIs
StatePublished - 1 Aug 2016

Keywords

  • Aqueous solutions
  • Association constants
  • Cadmium bromide
  • Cadmium iodide
  • Complex ions
  • Limiting molar conductances

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Physical and Theoretical Chemistry

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