The Hildebrand-Scatchard Solubility Parameter Theory

The Hildebrand-Scatchard Solubility Parameter Theory. —According to this theory the interaction parameter is given by 

Weimer has extended this theory, following the work done by van Arkel and Blanks, by including the effects due to polar molecules. This theory has been tested by Harris and Prausnitz for polar solutes in solvents octadecane and benzyldiphenyl and shown to be an improvement on the original theory. 

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