Thermodynamic determination of solvation potentials of various metal chlorides by (1,4-dioxane + water) mixtures through EMF measurements

Manjula Spah, Dal Chand Spah, Sooyoung Jun, Seungmoon Lee, Ho Jun Song, Koh Won-Gun, Jin Won Park

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The EMF data of different metal chlorides (2:1 electrolytes) were obtained by using a cell [MX Hg|MCl2 (m)|AgCl-Ag] at two temperatures. Stock solutions of metal chlorides (CoCl2, CuCl2 and ZnCl2) were prepared by weight in 1,4-dioxane-aqueous mixtures. There was a significant change in the EMF values with change of metal chloride, its concentration and solvents composition. The standard electrode potential (E°) values of the above cell were calculated from the measured EMF of these mixtures. The standard thermodynamic functions (ΔG°, ΔH° and ΔS°) and respective transfer parameters of MCl2 from water to 20, 45 and 70% dioxane-water mixtures were also evaluated. Equilibrium dissociation constants (K1 and K2) as well as the degrees of dissociation (α1 and α2) were obtained by iterative procedures. The data were analyzed in terms of solute-solvent interactions depending on standard and transfer thermodynamic parameters and mean activity coefficients (γ±) of electrolytes.

Original languageEnglish
Pages (from-to)17-27
Number of pages11
JournalFluid Phase Equilibria
Volume279
Issue number1
DOIs
Publication statusPublished - 2009 May 15

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Thermodynamic determination of solvation potentials of various metal chlorides by (1,4-dioxane + water) mixtures through EMF measurements'. Together they form a unique fingerprint.

  • Cite this