Title of article
Potentiometric Determination of Acidity Constants of Some Synthesized Organic Compounds in Organic-Water Media
Author/Authors
Baluja، Sh. نويسنده Physical Chemistry Laboratory, Department of Chemistry, Saurashtra University, Rajkot-360005 (Gujarat), India Baluja, Sh. , Ramavat ، P. نويسنده Physical Chemistry Laboratory, Department of Chemistry, Saurashtra University, Rajkot-360005 (Gujarat), India Ramavat , P. , Nandha، K. نويسنده Physical Chemistry Laboratory, Department of Chemistry, Saurashtra University, Rajkot-360005 (Gujarat), India Nandha, K.
Issue Information
فصلنامه با شماره پیاپی 0 سال 2016
Pages
8
From page
321
To page
328
Abstract
The acidity constants of some synthesized protonated pyrazolo quinazoline compounds were determined potentiometrically at ionic strength of 0.1 M in DMF: water (60:40 v/v) system at different temperatures (298.15 K to 318.15 K). The pKa values have been found to increase with increasing electron-donating nature of substitutions. Some thermodynamics parameters such as enthalpy (?H°), Gibb’s free energy (?G°) and entropy (?S°) of reactions have also been evaluated at different temperatures for these systems. The thermodynamic parameters indicate that dissociation process is not spontaneous and exothermic.
Journal title
Journal of Sciences
Serial Year
2016
Journal title
Journal of Sciences
Record number
2395143
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