Medium effects on the first and second dissociation reactions of adipic acid in ethanol-water mixtures

被引：0
作者：
El-Naggar, GA [1 ]
El Batouti, M
Zaghloui, AA
机构：
[1] Univ Alexandria, Fac Educ, Damanhour Branch, Dept Chem, Alexandria, Egypt
[2] Univ Alexandria, Fac Sci, Dept Chem, Alexandria, Egypt
来源：
BULLETIN OF ELECTROCHEMISTRY | 2001年 / 17卷 / 02期
关键词：
adipic acid; dissociation of dicarboxylic acid; dielectric constant of thermodynamic parameters of dissociation and solvent effect on;
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The first and second dissociation constants of adipic acid has been determined by a precise EMF method in water and in aqueous binary mixtures of ethyl alcohol, over a wide range of solvent composition (0-70 wt% ethanol). Measurements were made at different temperatures, ranging from 303 to 333 K at intervals of 283 K by EMF measurements. The thermodynamic parameters (DeltaH(0), DeltaG(0) and DeltaS(0)) for the first and second dissociation reactions have been computed, discussed and analyzed in terms of solute-solvent interactions. The pK values has been correlated with the mole fraction of the organic solvent and finally the effect of dielectric constant on the dissociation processes was discussed.
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页码：65 / 72
页数：8
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