Thermodynamic studies of potassium bromide in 10% glycerol-water mixture using conductometric technique. | [Pakistan Journal of Scientific and Industrial Research • 1987]

Author(s):

1. Mostafa M. Emara: Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

2. Hassan A. Shehata: Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

3. Ahmed M. Wasei: Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

Abstract:

The conductance of potassium bromide at (25-45)°C in 10% glycerol-water mixture in a concentration range (10-5-10-3) M has been measured. The association constant, KA' values have been determined, where the conductometric data were treated by the Fuoss and Edelson method. The KA values were decreased as the temperature increased where the thermal motion, probably destroys the solvent structure and hence the mobility of the ions should increase. The activation energy derived in this work is a little lower than the value obtained in aqueous media. The thermodynamic parameters Go Ho and so were also calculated. It is obvious that the entire process of the ionic association in this system is exothermic. The Walden product, n, decreases with an increase in temperature at 25-45. The results are explained in the light of solute -solvent interaction.

Page(s): 254-257

DOI: DOI not available

Published: Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 30, Issue: 4, Year: 1987

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