Origin of the Potential Differences Respon - Sible for Anomalous Osmosis

Abstract

In a series of papers 1 the writer has published the results of experiments showing the peculiar influence of electrolytes on the rate of diffusion of water through collodion membranes. When a'collodion membrane separates a solution of an electrolyte (of not too high a concentration) from pure warer, the water diffuses from the side of pure water to the solution side, but the initial rate at which this diffusion occurs does not obey van't Hoff's law, The initial rate of diffusion was measured by the rise of level of liquid in a glass tube inserted through a rubber stopper in a closed collodion bag containing t h e solution, the collodion bag dipping into a beaker filled with pure water. When the membrane was merely a collodion membrane, the following rules expressed the influence of electrolytes on the initial rate of diffusion of water through the membrane from the water side to the side of the solution. 1. Water diffuses into the solution of an electrolyte through a collodion membrane as if the particles of water were positively charged and as if they were attracted by the anion and repelled by the cation of the electrolyte in solution with a force increasing with the valency. 2. In the case of certain electrolytes the "attracting force" of the anion for water increraes at first more rapidly with increasing concentration than the "repelling force" of the cation, until a point is reached where with a further increase in concentration the "repelling force" of the cation increases more rapidly than the "attractive force" of the anion. Finally, a concentration is reached where the

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Cite this paper

@inproceedings{Loeb2003OriginOT, title={Origin of the Potential Differences Respon - Sible for Anomalous Osmosis}, author={Jacques Loeb}, year={2003} }