NBS Smoothed Experimental Data

From Hamer, W.J. and Y-C Wu, Osmotic Coefficients and Mean Activity Coefficients of Uni-univalent Electrolytes in Water at 25 C , J. Phys. Chem. Ref. Data. 1. 1047 (1972) 

The National Bureau of Standards fit experimental data to the following equation A  

The data was fit to the same kind of equation, but in a log base e form  

The NBS maximum molality of 5.0 is a supersaturated solution. A KCl solution is saturated at a molality of 4.803. 

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