The Representation of Electrical Conductances for Polyvalent Electrolytes by the Quint–Viallard Conductivity Equation: Part 7. Unsymmetrical 1:2 Type Electrolytes. Alkali Metal (Li, Na, K, Rb and Cs) Sulfates and Ammonium Sulfate

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Abstract

Electrical conductivities of dilute aqueous solutions of lithium, sodium, potassium, cesium, rubidium and ammonium sulfates were determined and analyzed in terms of partially associated electrolytes of the 1:2 type. The conductivities reported here were determined from 15 to 35 °C and are compared with available literature results. Representation of conductances, in a framework of the ion association model, was performed using the Quint–Viallard conductivity equation and the Debye–Hückel expression for activity coefficients. However, the equilibrium constants were considered as adjustable parameters. Specific conductivities in concentrated aqueous solutions of sulfates were fitted to a new empirical equation with only three adjustable parameters. These parameters at constant temperature are much easier to determine from experimental conductivities than the corresponding four parameters in the usually applied Casteel and Amis conductivity equation.

Original languageEnglish
Pages (from-to)103-123
Number of pages21
JournalJournal of Solution Chemistry
Volume46
Issue number1
DOIs
StatePublished - 1 Jan 2017

Keywords

  • Ammonium sulfate
  • Cesium sulfate
  • Electrical conductances
  • Ion equilibrium association constants
  • Lithium sulfate
  • Potassium sulfate
  • Rubidium Sulfate
  • Sodium sulfate

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