论文部分内容阅读
测定和计算水溶液中多组分电解质的活度系数是一项十分重要和相当复杂的工作。采用国产离子选择电极测得了ＮａＮＯ３－Ｃｕ（ＮＯ３）２－Ｈ２Ｏ体系中 ＮａＮＯ３和 Ｃｕ（ＮＯ３）２的平均离子活度系数。还用所测数据和部分文献数据对Ｆｒａｎｋ－Ｔｈｏｍｐｓｏｎ弥散晶格模型、Ｍｅｉｓｓｎｅｒ半经验模型和Ｐｉｔｚｅｒ方程进行了检验。结果表明．用离子选择电极测定某些离子活度系数的方法简便易行。３个模型的计算精度不同。带θ、参数的Ｐｉｔｚｅｒ方程精度最高。
Determining and calculating the activity coefficient of multi-component electrolytes in aqueous solution is a very important and complicated task. The average ionic activity coefficient of NaNO3 and Cu (NO3) 2 in NaNO3-Cu (NO3) 2-H2O system was measured by domestic ion-selective electrode. The Frank-Thompson dispersion lattice model, Meissner semi-empirical model and Pitzer equation were also tested with the measured data and some literature data. The results show. The method of measuring the ion activity coefficient of some ion selective electrodes is simple and easy. The accuracy of the three models is different. The Pitzer equation with θ and parameters has the highest accuracy.