Water activities, osmotic and activity coefficients of the system (NH4)2SO4-K2SO4-H2O at the temperature 298.15 K

被引：8

作者：

El Guendouzi, M ^{[1
]}

Azougen, R ^{[1
]}

Mounir, A ^{[1
]}

Benbiyi, A ^{[1
]}

机构：

[1] Univ Hassan II Mohammedia, Chim Phys Lab, Dept Chim, Fac Sci Ben Msik, Casablanca, Morocco

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2003年 / 27卷 / 04期

关键词：

D O I：

10.1016/j.calphad.2004.02.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The mixed aqueous electrolyte system consisting of ammonium and potassium sulfates has been studied using the hygrometric method at the temperature 298.15 K. The water activities are measured at total ionic strength values ranging from 0.60 to 8.25 mol kg(-1) for different ionic strength fractions (y) of (NH4)(2)SO4 with y = 0.20, 0.50 and 0.80. The obtained data allow the deduction of osmotic coefficients. The experimental results are compared with the predictions of the Zdanovskii-Stokes-Robinson (ZSR), Kusik and Meissner (KM), Robinson and Stokes (RS). Lietzke and Stoughton (LS II), Reilly-Wood and Robinson (RWR) and Pitzer models. From these measurements, the new Pitzer mixing ionic parameters are determined and used to predict the solute activity coefficients in the mixture. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：409 / 414

页数：6

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