Activity coefficients of LiCl in (PEG 4000+water) at T = (288.15, 298.15, and 308.15) K

被引：23

作者：

Morales, Jaime W. ^{[2
]}

Galleguillos, Hector R. ^{[2
]}

Graber, Teofilo A. ^{[2
]}

Hernandez-Luis, Felipe ^{[1
]}

机构：

[1] Univ La Laguna, Dept Quim Fis, Tenerife, Spain

[2] Univ Antofagasta, Ctr Invest Cient & Tecnol Mineria, Dept Ingn Quim, Antofagasta, Chile

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2010年 / 42卷 / 10期

关键词：

LiCl; PEG; 4000; emf; Ion-selective electrode (ISE); Activity coefficient; AQUEOUS 2-PHASE SYSTEMS; EPSILON-INCREASING COSOLVENT; IMPROVED ISOPIESTIC METHOD; LIQUID-LIQUID EQUILIBRIA; FORMAMIDE-WATER MIXTURES; PLUS WATER; CELL H2(PT)-HCL-AGCL-AG; POLY(ETHYLENE GLYCOL); VIRIAL EQUATION; PHASE-DIAGRAMS;

D O I：

10.1016/j.jct.2010.05.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The electromotive force of the cell containing two ion-selective electrodes (ISE), Na-ISE vertical bar LiCl (m). PEG 4000 (w), H2O (1 - w)vertical bar CI-ISE has been measured at temperatures of (288.15, 298 15, and 308.15) K as a function of the mass fraction of PEG 4000 (w) in the mixture. w was varied between 0 and 025 in 0.05-unit steps and the molality of the electrolyte (m) was between c.a. (0 03 and 5 8) mol kg(-1) The values of the standard electromotive force. E degrees. were determined using routine methods of extrapolation, together with extended Debye-Huckel and Pitzer equations. The results obtained produced good internal consistency for all the temperatures studied Once E was determined, the mean ionic activity coefficients for LiCl, the Gibbs free energy of transfer from the water to (PEG 4000 + water), and the primary LiCl hydration number were calculated. (C) 2010 Elsevier Ltd All rights reserved

引用

页码：1255 / 1260

页数：6

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