Electrical conductance of alkali chlorides in mixed solvents : Methanol + carbon tetrachloride and methanol + 1,4-dioxane at 298.15 K

Department of Chemistry, University of North Bengal, Darjeeling-734 430, West Bengal, India

E-mail : mahendraroy@yahoo.co.in Fax : 91-353-2581546

Manuscript received 18 November 2005, revised 7 August 2006, accepted 16 October 2006

Conductance measurements for selected alkali metal chlorides, MCl (M⁺ = Li, Na, K) are performed in the binary mixtures of methanol with carbon tetrachloride and 1,4-diqxane at 298.15 K. The limiting equivalent conductance (ᴧ₀),the association constant (K_A),and the Walden products (ᴧ₀ƞ₀) for the three salts are evaluated at all the mole fractions of the solvent mixtures using the 1978 Fuoss conductance-concentration equation. Analysis of data indicates presence of strong association of the electrolytes in the solvent mixtures studied here. The results have been discussed and interpreted in terms of ion-solvent interactions and structural changes in the mixed solvent systems.