Open Access“ Dynamic ” osmotic pressures
Publication year - 1909
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1909.0032
Subject(s) - osmotic pressure , nernst equation , diffusion , thermodynamics , chemistry , solvent , osmosis , mechanics , membrane , physics , biochemistry , electrode
1. The following paper is a preliminary account of what is apparently a new method of measuring osmotic pressures. The account is published now because during the course of the experiments we have unfortunately damaged the only two good semi-permeable membranes that we possess, and it will be some months before the damage can be repaired. 2. A word of explanation as to the use of “ dynamic ” to distinguish the osmotic phenomena we are about to describe seems necessary. In all discussions of osmotic pressures (except those involving diffusion) the locution “ osmotic pressure ” connotes some form of equilibrium between a solution and its solvent; in the experiments about to be recorded we have measured the rate at which the solvent flows into the solution, and the essence of the observations lies in the fact that there should be no approach to equilibrium. Thus the osmotic pressure here involved is substantially that assumed to act in Nernst’s theory of diffusion.