Toward Understanding the Colligative Properties of a Solution
An alteration in the solvent, attributable to the dispersal of finely divided substances throughout the solvent, induces the colligative properties of the solution. These properties of the solution include its osmotic pressure, its melting temperature and boiling temperature and the vapor pressure of the solvent. There is, however, no adequate theoretical treatment which provides a coherent account of these properties even for water solutions. We have reviewed in Chapter I the history of venerable thought concerning the colligative properties, especially the osmotic pressure of a solution; and, as we have noted, the foundations for understanding these properties have been frequently misunderstood. Therefore, we shall reexamine these foundations and derive what we believe to be the only admissible account of the colligative properties of a solution. We shall conclude that the alteration in the solvent, which is attributable to the dispersal of solute throughout the solvent, is an enhanced negative hydrostatic pressure in the solvent within the solution (35 b).
KeywordsVapor Pressure Osmotic Pressure Solvent Molecule Gravity Field Molar Enthalpy
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