Solubility and activity coefficients of acidic and basic non-electrolytes in aqueous salt solutions -: 3.: Solubility and activity coefficients of adipic and pimelic acids in NaCl(aq), (CH3)4NCl(aq) and (C2H5)4NI(aq) at different ionic strengths and at t=25 °C

被引：41

作者：

Bretti, Clemente ^{[1
]}

Cigala, Rosalia Maria ^{[1
]}

Crea, Francesco ^{[1
]}

Foti, Claudia ^{[1
]}

Sammartano, Silvio ^{[1
]}

机构：

[1] Univ Messina, Dipartimento Chim Inorgan Chim Analit & Chim Fis, I-98166 Messina, Italy

来源：

FLUID PHASE EQUILIBRIA | 2008年 / 263卷 / 01期

关键词：

adipic and pimelic acids; protonation constants; solubility and distribution measurements; activity coefficients; Setschenow coefficients; SIT and Pitzer parameters;

D O I：

10.1016/j.fluid.2007.09.018

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The solubility of two dicarboxylic acids (COOH)-(CH2)(n)-(COOH) (n=4,5; namely: adipic and pimelic acids, respectively) was determined in NaCl(aq)(0.5-4.5) mol L-1,(CH3)(4)NCl(aq) (0.25-3) mol L-1,(C2H5)(4)NI(0.25-1) mol L-1 and in pure water, at t=25 degrees C. The activity and Setschenow (k) coefficients of neutral species were calculated in all ionic media from solubility data. These coefficients, in NaCl ionic medium, were also calculated by distribution (2-methyl-1-propanol/aqueous solution) measurements. The solubility trend is (C2H5)(4)NI > (CH3)(4)NCl > NaCl. To fully characterize the acid-base behaviour of the dicarboxylic acids, the self-interaction (k(i)) parameters from solubility and distribution data and the dimerization constant (K-D) from the protonation constants in the same experimental conditions, were calculated. From these data, together with solubility ones, Pitzer and SIT parameters were calculated. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：43 / 54

页数：12

共 23 条

[1] Salt effects on caffeine solubility, distribution, and self-association [J].