Molecular Buoyancy and Osmotic Equilibrium | Zendy

M. Perez | Zendy; P. F. Scholander | Zendy

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Molecular Buoyancy and Osmotic Equilibrium

Author(s) -

M. Perez,

P. F. Scholander

Publication year - 1972

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.69.2.301

Subject(s) - buoyancy , osmotic pressure , thermodynamics , chemistry , neutral buoyancy , coupling (piping) , osmosis , colloid , osmometer , chromatography , materials science , biochemistry , physics , membrane , metallurgy

Measurements of osmotic equilibrium of colloidal solutions, ranging from 170,000 to 20,000 in molecular weight, show that the negative buoyancy of the solute molecules is additive to the osmotic pressure. Seen together with earlier measurements of positive buoyancy of oil suspensions, these data confirm that the osmotic interaction between solute and solvent at equilibrium is purely a force-coupling at the free surface.

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