Viscosity of lithium chloride solutions in water-methanol mixtures. | [Pakistan Journal of Scientific and Industrial Research • 1995]

Author(s):

1. Fahim-Uddin: Chemistry Department, University of Karachi, Karachi, Pakistan

2. M. Aejaz Naim: Chemistry Department, University of Karachi, Karachi, Pakistan

3. Rehana Saeed: Chemistry Department, University of Karachi, Karachi, Pakistan

4. Iqbal Hussain: Chemistry Department, University of Karachi, Karachi, Pakistan

Abstract:

The viscosities of LiCI in aqueous methanol solution (10-50%) were measured at various concentrations (1.0x102 to 8.0 x 10-2 mol.dm-3) and temperatures (30-46oC) respectively. The viscosity was interpreted in terms of Jones-Dole and Root density equations. Jone-Dole coefficients A and B and Root equation constants were evaluated by linear extrapolation using the least square method. The positive and increasing value of Jone-Dole B-coefficients lead to the conclusion that lithium chloride in aqueous methanol behaves as structure enhancer. Different activation parameters such as energy of activation (DE), free energy change (GD¹) and entropy change of activation (DS¹) at different solvent composition and salt concentrations were also evaluated.

Page(s): 61-66

DOI: DOI not available

Published: Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 38, Issue: 2, Year: 1995

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