【摘要】 用Ｃｌｅｇｇ－Ｐｉｔｚｅｒ方程关联了ＨＮＯ３－Ｈ２Ｏ和ＵＯ２（ＮＯ３）２－Ｈ２Ｏ单一电解质水溶液离子 平均活度系数。在此基础上考察了有无混合参数对ＨＮＯ３－ＵＯ２（ＮＯ３）２－Ｈ２Ｏ非对称混合电解质 水溶液体系的关联和预测功能的影响，并与原Ｐｉｔｚｅｒ方程进行了比较。结果表明，Ｃｌｅｇｇ－Ｐｉｔｚｅｒ 方程在电解质浓度适用范围及预测精度方面均优于原Ｐｉｔｚｅｒ方程。更多还原

【Abstract】 The Clegg-Pitier equation is used to correlate the average ionic activity coefficients in single electrolyte aqueous solutions of HNO3-H2O and UO2 (NO3)2-H2O at 25C. The correlation and prediction capabilities of these equations for mixed electrolyte aqueous solutions of HNO3-UO2 (NO3)2-H2O are tested with and without the adjustable mixed parameters, respectively. They are compared with the original Pitzer equation. The results show that the Clegg-Pitzer equation is superior to the Pitzer equtation. The former has the advantage of good precision in prediction in wider concentration ranges of electrolytes.更多还原