Abstract
IT is known that the molecular weights of pure solutes as calculated by the cryoscopic method are not found to be constant for varying dilutions, and it has been reported1 that Kf also varies, the tendency being for the cryoscopic constant to decrease in value as the concentration increases. Meldrum, Saxer and Jones2 studied this anomaly in the case of camphor and found that for various solutes of known molecular weights, the constant for one gram-molecule per 1,000 grams of solvent fell from 50 at low concentrations to 39·7 in solutions of molality greater than 0·2.
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References
Glasstone, S., "Text-book of Physical Chemistry", p. 633. Menzies, A. W. C., and Wright, S. L., J. Amer. Chem. Soc., 43, 2, 2314 (1921). Rall, H. T., and Smith, M., Ind. Eng. Chem. (Anal. Ed.), 8, 324 (1936).
Meldrum, W. B., Saxer, L. P., and Jones, T. D., J. Amer. Chem. Soc., 65, (10), 2023 (1943).
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BRANCKER, A., LEACH, S. & DANIELS, V. A Modification to the Cryoscopic Equation. Nature 153, 407 (1944). https://doi.org/10.1038/153407a0
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DOI: https://doi.org/10.1038/153407a0
