Activity Coefficients of RbF in Urea–Water and Formamide–Water Mixtures from Potentiometric Measurements

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• 作者：Xiuhua Hao ; Shuni Li ; Quanguo Zhai ; Yucheng Jiang ; Mancheng Hu
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：January 14, 2016
• 年：2016
• 卷：61
• 期：1
• 页码：220-227
• 全文大小：316K
• ISSN：1520-5134

文摘

The potentiometric method was used to obtain mean activity coefficients of RbF in urea/formamide–water mixed solvents at 298.2 K. The weight fractions of amide were varied from 0 to 40 %. The Pitzer, modified Pitzer and extended Debye–Hückel equations were used for representing the mean activity coefficients and other related thermodynamic properties of the systems. Furthermore, corresponding parameters of the thermodynamic models mentioned herein before were also obtained.