The applicability of the density rule of Pathwardhan and Kumer and the rule based on the linear
isopiestic relation is studied by comparison with experimental density data in the literature. Predicted and measured
v...The applicability of the density rule of Pathwardhan and Kumer and the rule based on the linear
isopiestic relation is studied by comparison with experimental density data in the literature. Predicted and measured
values for 18 electrolyte mixtures are compared. The two rules are good for mixtures with and without common
ions, including those containing associating ions. The deviations of the rule based on the linear isopiestic relation are
slightly higher for the mixtures involving very strong ion complexes, but the predictions are still quite satisfactory.
The density rule of Pathwardhan and Kumer is more accurate for these mixtures. However, it is not applicable
for mixtures containing non-electrolytes. The rule based on the linear isopiestic relation is extended to mixtures
involving non-electrolytes. The predictions for the mixtures containing both electrolytes and non-electrolytes and
the non-electrolyte mixtures are accurate. All these results indicate that this rule is a widely applicable approach.展开更多
基金Supported by the Science Foundation of University of Petroleum (No. ZX9903), the Open Science Foundation of the State Key Laboratory of Heavy Oil Processing (No. 200005), and the National Natural Science Foundation of China (No. 20006010).
文摘The applicability of the density rule of Pathwardhan and Kumer and the rule based on the linear
isopiestic relation is studied by comparison with experimental density data in the literature. Predicted and measured
values for 18 electrolyte mixtures are compared. The two rules are good for mixtures with and without common
ions, including those containing associating ions. The deviations of the rule based on the linear isopiestic relation are
slightly higher for the mixtures involving very strong ion complexes, but the predictions are still quite satisfactory.
The density rule of Pathwardhan and Kumer is more accurate for these mixtures. However, it is not applicable
for mixtures containing non-electrolytes. The rule based on the linear isopiestic relation is extended to mixtures
involving non-electrolytes. The predictions for the mixtures containing both electrolytes and non-electrolytes and
the non-electrolyte mixtures are accurate. All these results indicate that this rule is a widely applicable approach.