Solvent effects on the dissociation of weak acids in water-etoh mixtures at 298.l5 K

Acta Chimica Sinica ›› 1995, Vol. 53 ›› Issue (2): 120-124. Previous Articles Next Articles

Original Articles

水-乙醇混合溶剂中弱酸电离的溶剂效应

雪群芳;俞庆森;宗汉兴;林瑞森

淅江大学化学系

发布日期:1995-02-15

Solvent effects on the dissociation of weak acids in water-etoh mixtures at 298.l5 K

XUE QUNFANG;YU QINGSEN;ZONG HANXING;LIN RUISEN

Published:1995-02-15

Abstract

The ionization enthalpies of acetic acid, chloroacetic acid, bromoacetic acid, iodoacetic acid, propionic acid, and n-butyric acid in water-EtOH mixtures were measured at 298.15K with an LKB 2277 bioactivity monitor. The values of free energy and entropy of ionization were then calculated On the base of experimental data, the free energy changes on transfer of carboxylate ions from water to water-EtOH mixtures were obtained. The solvent effect on the ionization of the six weak acids was discussed.

Key words: ETHANOL, WATER, FATTY ACID, THERMODYNAMIC FUNCTION, SOLVENT EFFECT, MIX SOLVENT

CLC Number:

O645
O642

Cite this article

XUE QUNFANG;YU QINGSEN;ZONG HANXING;LIN RUISEN. Solvent effects on the dissociation of weak acids in water-etoh mixtures at 298.l5 K[J]. Acta Chimica Sinica, 1995, 53(2): 120-124.

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水-乙醇混合溶剂中弱酸电离的溶剂效应

Solvent effects on the dissociation of weak acids in water-etoh mixtures at 298.l5 K

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