Trend and energetics of pK* vs. ionic strength for o-chlorobenzoic, m-nitrobenzoic and benzoic acids in aqueous KNO3 solutions at 298 K

被引：7

作者：

Barriada, JL ^{[1
]}

Brandariz, I ^{[1
]}

Armesto, XL ^{[1
]}

Herrero, R ^{[1
]}

de Vicente, MES ^{[1
]}

机构：

[1] Univ A Coruna, Fac Ciencias, Dept Quim Fundamental & Ind, La Coruna, Spain

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1998年 / 94卷 / 20期

关键词：

D O I：

10.1039/a806180g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ionization constants for benzoic, m-nitrobenzoic and o-chlorobenzoic acids are experimentally determined in aqueous KNO3 solutions and ionic strength dependence of data are analysed by using Guggenheim's model for activity coefficients. Moreover, for benzoic acid, energetic contributions Delta G(ex) in the minimum of the pK-ionic strength curve are calculated. It is found that ca. 20% of the total excess energy is due to the non-Debye-Huckel term. A discussion of pK*(I) in terms of solvation energy is also given.

引用

页码：3093 / 3096

页数：4

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