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本文在Pb(Ⅱ)—Cl~-配位体系的热力学研究中,应用Pitzer方程计算高浓、复杂的配合物溶液的活度系数.在无支持电解质存在下,设计安排了无液接电势的电动势法,测算了Pb(Ⅱ)—Cl~-体系在35℃配位反应的热力学平衡常数以及配离子的活度系数式中的维里系数值.计算了25℃时热力学平衡常数和不同离子强度下的浓度平衡常数.成功地预测了25℃时PbCl_2在NaCl溶液中的溶解度.
In the thermodynamics study of Pb (Ⅱ) -Cl ~ - coordination system, Pitzer equation was used to calculate the activity coefficient of high and complex complex solution. In the absence of supported electrolyte, Electromotive force method was used to calculate the thermodynamic equilibrium constants of the coordination reaction of Pb (Ⅱ) -Cl ~ - at 35 ℃ and the Veri? C coefficients in the activity coefficient formula of the complex ions.The thermodynamic equilibrium constants at 25 ℃ and different ions The concentration equilibrium constant under the intensity of PbCl2 was successfully predicted at 25 ℃ in the NaCl solution.