End-Point Cryoscopy

Abstract

MANY methods in use for the cryoscopy of solutions suffer from the difficulty of equating an observed freezing point with a definite concentration. The procedure developed by us has avoided this difficulty by determining the temperature of a solution at which the last trace of frozen solvent melts. Thus the freezing point is measured at a concentration which has been established by direct weighing. This is particularly useful for organic solutions where accurate analysis (as for equilibrium cryoscopy) is often impractical.