Association constants for the NaSO4- ion pair in concentrated cesium chloride solutions

被引：24

作者：

Capewell, SG ^{[1
]}

Hefter, GT ^{[1
]}

May, PM ^{[1
]}

机构：

[1] Murdoch Univ, Dept Chem, Murdoch, WA 6150, Australia

来源：

TALANTA | 1999年 / 49卷 / 01期

关键词：

sulfate ion; sodium ion; ion-pairing; cesium chloride;

D O I：

10.1016/S0039-9140(98)00346-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Values of the association constant, beta(NaSO4-), for the weak ion-pair formed by sodium and sulfate ions in aqueous solution have been determined at 25 degrees C by high precision sodium ion-selective electrode potentiometry in solutions of ionic strength ranging from 0.50 to 7.00 M in CsCl media and in 1.00 M Me4NCl. The data in CsCl media were fitted to an extended form of the Debye-Huckel equation which yielded log beta(NaSO4-)(0) = 0.834 +/- 0.005 at infinite dilution. Evidence is also presented for the formation of very weak ion-pairs between Cs+ and SO42-. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：25 / 30

页数：6

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