Prediction of Water Activities in Multicomponent Solutions of Metal Chlorides from the Thermodynamic Properties of Corresponding Binary Systems
来源期刊：中南大学学报(英文版)2000年第1期
论文作者：LI Yuan-gao ZHANG Quan-ru FANG Zheng
文章页码：29 - 33
Key words：activity of water; electrolyte; thermodynamic model; interchange energy
Abstract: In order to calculate the activity coefficients ofwater in aqueous solution of metal electrolytes, a simplified model predicting them in ternary or multicomponent solutions with common anions from the activity data of water of the corresponding binary systems has been developed based on an assumption that the electrolytes in the solution are treated as independent particles instead of their ion forms, and the interaction of the salt(i)-salt(j) pair in the solution is assumed to be muchweaker than that of watersalt pair due to the common anions of both of salts. The model was applied to the systems such as KCl-H2O-NaCl, MCl-H2O-M′Cl2 (M represents Na and K, M′represents Ca and Ba) and KCl-H2O-NaCl-BaCl2 with satisfying results. The interchange energies of the studied component pairs between water and salts have also been determined by the corresponding binary aqueous solutions.
