The possibility of determining the activity coefficients of individual ions from acid-base titration data

被引：3

作者：

Jano, I ^{[1
]}

Hardcastle, JE ^{[1
]}

机构：

[1] Texas Womans Univ, Dept Chem & Phys, Denton, TX 76204 USA

来源：

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1998年 / 95卷 / 07期

关键词：

activity coefficients of ions; acid-base titration; general equation; titration curve; ionic strength;

D O I：

10.1051/jcp:1998330

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A method is described for obtaining the activity coefficients of individual ions from experimental titration data. For this purpose, a general polyprotic acid-base-titration-curve equation is derived. The equation allows obtaining the dissociation equilibrium constants of the acid and the ratio of the activity coefficient of each ion to the activity coefficient of the undissociated acid directly from the titration data. Results obtained are compared with coefficients calculated using Debye-Huckel equation. A general equation relating the ionic strength to the pH of the titration medium is also established.

引用

页码：1583 / 1605

页数：23

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