Generalized correlations of mean activity coefficients of polyelectrolytes with monovalent gegenions in aqueous solutions

AIChE Journal ◽  
1982 ◽  
Vol 28 (5) ◽  
pp. 861-863
Author(s):  
N. A. Peppas
Keyword(s):  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Mean Activity Coefficients

Activity Coefficients of Aqueous Solutions of NaOH and KOH in Wide Concentration and Temperature Ranges

1996 ◽  
Vol 61 (11) ◽  
pp. 1549-1562 ◽  
Author(s):  
Jan Balej
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Temperature Interval ◽  
Water Activity ◽  
Activity Coefficients ◽  
Correlation Equations ◽  
Wide Temperature Interval ◽  
Temperature Ranges ◽  
Mean Activity Coefficients

Up to now, there exist a quite wide temperature interval between 70 or 80 and 150 °C with no sufficiently reliable experimental data of mean activity coefficients for aqueous NaOH as well as KOH solutions. In order to fill this gap, it was tried to derive suitable correlation equations for this quantity in dependence on the molality (for NaOH in the range mNaOH = 2-25 mol kg-1, for KOH in the range mKOH = 2-18 mol kg-1) and temperature (in the range 0-200 °C for both kinds of solutions) on the basis of the available data of this quantity and with the use of the previously derived correlation equations for the water activity in aqueous solutions of NaOH and KOH under the same conditions. The comparison between the calculated and experimental data was discussed.

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