Mean activity coefficients in the NaCl-NH4HCO3-H2O system at 293.15-308.15 K

被引：5
|
作者：
Ji, XY
Lu, XH [1 ]
Lin, WL
Zhang, LZ
Wang, YR
Shi, J
Lu, BCY
机构：
[1] Nanjing Univ Chem Technol, Dept Chem Engn, Nanjing 210009, Peoples R China
[2] Univ Ottawa, Dept Chem Engn, Ottawa, ON K1N 6N5, Canada
来源：
FLUID PHASE EQUILIBRIA | 2001年 / 178卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
activity coefficients; ion-selective electrode; aqueous solution; weak electrolyte; mixture; data;
D O I：
10.1016/S0378-3812(00)00469-6
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The mean activity coefficients of NaCl in the NaCl-NH4HCO3-H2O system, measured by an electrochemical cell using ion-selective electrodes, were used to calculate the mean activity coefficients of NH4HCO3 in the system through a thermodynamic model. The measurements were made at four temperatures from 293.15 to 308.15 K up to 1.8 mol kg(-1), at NH4HCO3 molality fractions of 0.2 and 0.4. Both sets of values agree with those obtained from Pitzer equation incorporated with chemical reactions. This observation supports the applicability of the existing parameters for calculating mean activity coefficients of this system. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：259 / 270
页数：12
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