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Vol. 28 No. 4 (2016): Vol 28 Issue 4

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Ion Association and Solvation Behaviour of Metal(II) Chlorides in Binary Mixtures of Methanol + Water: A Conductance Method

https://doi.org/10.14233/ajchem.2016.19653
Lalzawnpuia
Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl-796 004, India
N. Mohondas Singh
Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl-796 004, India

Corresponding Author(s) : N. Mohondas Singh

nmdas08@rediffmail.com; nirjara@rediffmail.com

Asian Journal of Chemistry, Vol. 28 No. 4 (2016): Vol 28 Issue 4

Abstract

Molar conductances of N-[benzoylamino)thioxomethyl]histidine Ni(II) chloride and N-[benzoylamino)thioxomethyl]histidine Mn(II) chloride have been studied in mole fraction (0.00 to 1.00) of methanol in water at varying temperature from 283.15-313.15 K. The limiting molar conductances (L°) and association constants (KA) for ion pair formation in the mixed solvent systems have been evaluated using Shedlovsky technique. Gibbs energy (DG°), enthalpy (DH°), entropy (DS°) and Arrhenius activation energy (Ea) for ion-association reaction were derived from the temperature dependence of ion association constant. Based on the composition dependence of Walden product (Loho) and different thermodynamic properties (DG°, DH°, DS°) and Arrhenius activation energy (Ea) of transport processes have been determined. The influence of the solvent composition on ion-association and solvation behaviour of ions was discussed in terms of ion-ion, ion-solvent and solvent-solvent interactions.

Keywords

Conductance Association constant Walden’s product Transition metal(II) chlorides
Lalzawnpuia, ., & Singh, N. M. (2015). Ion Association and Solvation Behaviour of Metal(II) Chlorides in Binary Mixtures of Methanol + Water: A Conductance Method. Asian Journal of Chemistry, 28(4), 910–916. https://doi.org/10.14233/ajchem.2016.19653
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