Thermodynamic determination of solvation potentials of various metal chlorides by (1,4-dioxane + water) mixtures through EMF measurements |
| |
| Authors: | Manjula Spah Dal Chand Spah Sooyoung Jun Seungmoon Lee Ho-Jun Song Koh Won-Gun Jin-Won Park |
| |
| Institution: | 1. Department of Chemistry, Yonsei University, Seoul 120 749, South Korea;2. Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120 749, South Korea;3. Department of Chemistry, Geeta Vidya Mandir Girls College, Sonepat 131 001, India;4. Department of Chemistry, Govt. College Gohana, Haryana 131 301, India |
| |
| 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. |
| |
| Keywords: | Thermodynamic transfer Metal halides EMF Dissociation constant Degree of dissociation 1 4-Dioxane |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
