alexa Solvation of Oxytetracycline Hydrochloride in Ethanol-Water Mixed Solvents.
e-ISSN: 2319-9849

Research & Reviews: Journal of Chemistry
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Research Article

Solvation of Oxytetracycline Hydrochloride in Ethanol-Water Mixed Solvents.

Esam A Gomaa1*, Elsayed M Abou Elleef2 and Elsayed T Helmy3

Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt.

Basic Science Department, Delta Higher Institute for Engineering & Technology, 35681- Dakhlia, Mansoura, Egypt

Mansoura College international language schools(MCILS) (American –IGCSE-British), Dakhlia ,Mansoura Egypt,15-Talkha

*Corresponding Author:
Esam A Gomaa
Chemistry Department
Faculty of Science
Mansoura University
35516-Mansoura, Egypt

Received: 06 June 2014 Accepted: 04 March 2014 Published: 09 March 2014



The aim of this study was to determine the thermodynamic functions, Gibbs energy, enthalpy and entropy for the solution processes of oxytetracycline hydrochloride in the mixed solvent (ethanol+water) from solubility values obtained at temperatures ranging from 293.15 K to 308.15 K. The respective thermodynamic functions for mixing and solvation processes as well as the activity coefficients for the solute were calculated. The experimental results enable us to estimate the value of thermodynamic solubility product, Ksp(th), of oxytetracycline hydrochloride in the mixed solvent. In addition, Gibbs energy, enthalpy, entropy for the solution processes and free energies of transfer of oxytetracycline hydrochloride from water to ethanol solutions.


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