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Measurements of electromotive force and transport numbers across ion-exchange membranes

A.S. Tombalakian
W.F. Graydon
AT

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A.S. Tombalakian

Résumé du colloque

Direct measurements of electromotive force and transport numbers for sodium ion and water have been made across polystyrene-sulfonic acid ion-exchange membranes separating different solutions of sodium chloride over a wide range of external solution concentration. The results indicate that the electrochemical potentials corresponding to the reversible transport of sodium chloride and water may be measured with a reasonably high degree of precision using polystyrene-sulfonic acid ion-exchange membranes even in highly concentrated solutions. The measured electrical transference numbers for sodium ion verify the estimates of transference numbers which have been made from ion-interchange fluxes obtained in counter-diffusion experiments across the same membrane separating isotonic solutions of sodium nitrate and hydrochloric acid using the Nernst-Planck equation.

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Section :
Chimie physique
news icon Thème du colloque :
Chimie physique
manager icon Responsables :
R. Savoie
host icon Hôte : Université Laval

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