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Mean Ionic Activity Coefficients of NaBr in the Ternary System NaBr–SrBr2–H2O at 288.15 K using the Cell Potential Method
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-10-14 , DOI: 10.1021/acs.jced.9b01137
Xing Liu 1 , Lan-Rong Zhao 1 , Shi-Hua Sang 1, 2 , Yun-Yun Gao 1 , Qi Ge 1
Affiliation  

In this paper, a sodium ion selective electrode (Na-ISE) and a bromide ion selective electrode (Br-ISE) were used to form a liquid-free potential reversible battery: Na-ISE|NaBr (m1) and SrBr2 (m2)|Br-ISE. The mean ionic activity coefficients of NaBr in the ternary system NaBr–SrBr2–H2O at 288.15 K were determined using the cell potential method. In this system, the total ionic strength, I, ranges from 0.0100 up to 2.0000 mol · kg–1 for different ionic strength fractions yb of SrBr2, that is, yb = (0.0, 0.2, 0.4, 0.6, and 0.8). The results show that Na-ISE and Br-ISE have a great Nernst effect. The mean ionic activity coefficients of NaBr in NaBr–SrBr2–H2O were calculated using the Nernst equation, and the cell potential values were measured. The Pitzer ion interaction parameters θNa+ · Sr2+ and ψNa+ · Sr2+ · Br were fitted using the Pitzer model, and experimental results in this work, and the mean ionic activity coefficients of SrBr2 at 288.15 K were also calculated according to the Pitzer model. Finally, the osmotic coefficient Φ, water activity aw, and excess Gibbs energy GE of the ternary system were also calculated.

中文翻译:

细胞势法在288.15 K的三元体系NaBr–SrBr 2 –H 2 O中NaBr的平均离子活度系数

在本文中,使用钠离子选择电极(Na-ISE)和溴离子选择电极(Br-ISE)形成无液电势可逆电池:Na-ISE | NaBr(m 1)和SrBr 2m 2)| Br-ISE。使用细胞电势法测定了在288.15 K的三元体系NaBr–SrBr 2 –H 2 O中NaBr的平均离子活度系数。在这个系统中,总的离子强度,,从0.0100到2.0000摩尔范围公斤· -1对于不同离子强度的馏分ÿ b SrBr的2,即,ÿ b=(0.0、0.2、0.4、0.6和0.8)。结果表明,Na-ISE和Br-ISE具有很好的能斯特效应。使用能斯特方程计算NaBr在NaBr–SrBr 2 –H 2 O中的平均离子活度系数,并测量细胞电势值。的匹兹离子相互作用参数θ的Na +  ·的Sr 2+和ψ的Na +  ·锶2+  ·溴-使用皮特泽模型,并且在该工作的实验结果,并SrBr的平均离子活度系数拟合2在288.15 K含量也根据Pitzer模型计算得出。最后,渗透系数Φ,水活度瓦特,并且还计算了三元系统的多余吉布斯能量G E。
更新日期:2020-11-12
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