Critical evaluation of protonation constants. Literature analysis and experimental potentiometric and calorimetric data for the thermodynamics of phthalate protonation in different ionic media

被引：17

作者：

Bretti, Clemente ^{[1
]}

De Stefano, Concetta ^{[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：

JOURNAL OF SOLUTION CHEMISTRY | 2006年 / 35卷 / 09期

关键词：

phthalic acid; protonation constants; ionic strength dependence; temperature dependence; activity coefficients; SIT model; Pitzer model;

D O I：

10.1007/s10953-006-9057-6

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 phthalate were determined in aqueous NaCl (0.1 <= I <= 5mol . L(-1)) and in aqueous Me(4)NCl (0.1 mol . L(-1) <= I <= 3 mol . L(-1)) at t = 25 degrees C. Experimental data were employed in conjunction with literature data from studies in different ionic media (Et(4)NI: 0 <= I <= 1mol . L(-1); NaClO(4): 0.05 mol . L(-1) <= I <= 2 mol . L(-1)) to study the dependence on ionic strength using different models, such as the SIT and Pitzer equations, and an Extended Debye-Huckel type equation. Experimental calorimetric data in NaCl and protonation constants at different temperatures in Et(4)NI (5 <= t <= 45 degrees C) and in NaClO(4) ( 15 <= t <= 35 degrees C) were also used to study their dependence on temperature. Recommended equilibrium data are reported together with a short discussion of a prospective protocol for drawing these data.

引用

页码：1227 / 1244

页数：18

共 39 条

[1]

[Anonymous], 1991, ACTIVITY COEFFICIENT, DOI DOI 10.1201/9781351069472

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