کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9633494 1426343 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental determination and prediction of activity coefficients of RbCl in aqueous (RbCl + RbNO3) mixture at T = 298.15 K
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Experimental determination and prediction of activity coefficients of RbCl in aqueous (RbCl + RbNO3) mixture at T = 298.15 K
چکیده انگلیسی
Activity coefficients for rubidium chloride in the (RbCl + RbNO3 + H2O) ternary system were determined from electromotive force (emf) measurements of the cell:Rb-ionselectiveelectrode(ISE)|RbCl(mA),RbNO3(mB),H2O|Ag|AgClat T = 298.15 K and over total ionic strengths from (0.01 upto 3.50) mol · kg−1. The Rb+ ion selective electrode (Rb-ISE) and Ag|AgCl electrode used in this work were made in our laboratory and had reasonably good Nernst responses, which demonstrate that the emf method can be applied to measure the above system with high precision. The experimental data were analyzed using the Harned rule and Pitzer model. The Harned coefficients and the Pitzer binary and ternary ionic interaction parameters for the system have been evaluated. The experimental results obey the Harned rule, and the Pitzer model can be used to describe this aqueous system satisfactorily. The activity coefficients of RbNO3, the osmotic coefficients of the mixtures and the excess free energy of mixing were also calculated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 37, Issue 11, November 2005, Pages 1162-1167
نویسندگان
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