A Differential, Dynamic Method for the Accurate Determination of Relative Vapor-Pressure Lowering: Thesis (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from A Differential, Dynamic Method for the Accurate Determination of Relative Vapor-Pressure Lowering: Thesis

In the study of solutions to determine the molecular condition of the solute, any of the colligative properties, osmotic pressure, boiling point elevation, freezing-point depression, or vapor pressure lowering, may be employed. For this purpose the osmotic pressure is of very little assistance because satisfactory semi-permeable membranes have, as yet, been prepared for only one or two solutes.

The boiling-point raising is difficult to measure with sufficient accuracy because of its variation with changes in atmospheric pressure, and, in the case of aqueous solutions, because the molar boiling point elevation is small. It has the additional disadvantage that the temperature and concentration change at the same time.

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