盐-水体系溶解平衡计算的自由能最小化及溶度积方法

Study on the Method of Minifying Free Energy and Solubility Product for the Calculation of the Equilibrium of Salt-Water System

根据电解质溶液的基本物理化学原理和近代电解质溶液理论的Pitzer离子相互作用模型,通过计算浓电解质溶液的活度系数和水的活度,研究了盐-水体系溶解平衡的计算方法。结果表明,体系Gibbs自由能最小化方法是计算盐-水体系溶解平衡的一种有效方法,其计算结果与溶度积法一致。

According to the basic physic-chemical principle of electrolyte solution and Pitzer Ion Interaction Approach, the study on the calculation of the equilibrium of salt-water system was carried out by calculating the activity coefficient of electrolyte solution and osmotic coefficient of water. The research showed that the method of minifying free energy was effective for the calculation of the equilibrium of salt-water system, its result was in accordance with that of method of solubility product.