pH and the surface tension of water

被引：107

作者：

Beattie, James K. ^{[1
]}

Djerdjev, Alex M. ^{[1
]}

Gray-Weale, Angus ^{[2
]}

Kallay, Nikola ^{[3
]}

Luetzenkirchen, Johannes ^{[4
]}

Preocanin, Tajana ^{[3
]}

Selmani, Atida ^{[3
]}

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Univ Melbourne, Sch Chem, Melbourne, Vic 3000, Australia

[3] Univ Zagreb, Fac Sci, Dept Chem, HR-10000 Zagreb, Croatia

[4] Karlsruher Inst Technol, Inst Nukl Entsorgung, D-76433 Eggenstein Leopoldshafen, Germany

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2014年 / 422卷

基金：

澳大利亚研究理事会;

关键词：

Surface tension; Air/water interface; pH; Gibbs isotherm; Salt effect; AIR/WATER INTERFACE; AQUEOUS INTERFACES; ION HYDRATION; ELECTROLYTES; BASE; ACID;

D O I：

10.1016/j.jcis.2014.02.003

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：

Despite the strong adsorption of hydroxide ions, the surface tension of water is almost independent of pH between pH 1 and 13 when the pH is adjusted by addition of HCl or NaOH. This is consistent with the Gibbs adsorption isotherm which measures the surface excess of all species in the double layer, if hydronium ions and hydroxide ions are adsorbed and sodium and chloride ions are not. The surface tension becomes pH dependent around pH 7 in millimolar NaCl or KCl solutions, for now sodium ions can replace hydronium ions as counterions to the adsorbed hydroxide ions. (c) 2014 Elsevier Inc. All rights reserved.

引用

页码：54 / 57

页数：4

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