THERMODYNAMIC PARAMETERS FOR THE PROTONATION OF CARBOXYLIC-ACIDS IN AQUEOUS TETRAETHYLAMMONIUM IODIDE SOLUTIONS

被引：66

作者：

DEROBERTIS, A ^{[1
]}

DESTEFANO, C ^{[1
]}

RIGANO, C ^{[1
]}

SAMMARTANO, S ^{[1
]}

机构：

[1] UNIV CATANIA,DIPARTIMENTO SCI CHIM,I-95125 CATANIA,ITALY

来源：

JOURNAL OF SOLUTION CHEMISTRY | 1990年 / 19卷 / 06期

关键词：

activity coefficients; aqueous tetraethylammonium iodide solutions; carboxylic acids; dependence on ionic strength; Thermodynamics of protonation;

D O I：

10.1007/BF00647030

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：

The protonation constants of 21 carboxylic acids (formic, acetic, propionic, benzoic, phenoxyacetic, salicylic, oxalic, malonic, succinic, itaconic, malic, tartaric, oxydiacetic, thiodiacetic, thiodipropionic, phthalic, maleic, citric, 1,2,3-tricarboxylic, 1,2,4-tricarboxylic and 1,2,4,5-tetracarboxylic), have been determined potentiometrically, by pH-metric measurements, at several temperatures and ionic strengths, 5≤T≤55°C, 0<1≤1 mol-dm-3, using tetraethylammonium iodide as background salt. General equations for the dependence on ionic strength of thermodynamic parameters have been found. The statistical significance of results and the possibility of using a simple model for the thermodynamics of carboxylic acids protonation, is discussed. © 1990 Plenum Publishing Corporation.

引用

页码：569 / 587

页数：19

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