within 0.1 mv. have been measured only for mem- ... The limiting current behavior of an ion-exchange membrane, however, is complex, and a new ..... 0 ...
at the membrane interfaces as a result of chloride ... mobility ofthe fractionated ions in the solution phase. ... (2) E. Manegold and K. Kalauch, Kolloid Z., 84, 313 (1938). ... and one is tempted to assume that the treatment is ..... what could be
(6) F. Aurich and E. Lippert, Spectrochim. Acta, 22, 1073 (1966). (7) G. Weber and B. Bablouzian, J. Biol. Chem., 241, 2558 (1966). (8) B. Witholt and L. Brand, ...
Xue D. Wang , Wei Shen , Robert W. Cattrall , Graeme L. Nyberg , John Liesegang .... R.C. Hawkings , L.P.V. Corriveau , S.A. Kushneriuk , P.Y. Wong. Analytica ...
exchange between sodium cations and intrazeolite methyl viologen into the Nernst equation shows that equilibrium at the zeolite-solution interface is set up ...
W. Richard Bowen*, and Enda Moran. Biochemical Engineering Group, Department of Chemical Engineering, University of Wales, Swansea, SA2 8PP UK.
15 Dec 1995 - From a knowledge of these fundamental thermodynamic properties, the solution .... the following well-known thermodynamic relationship:.
Feb 8, 1996 - W. Richard Bowen* andEnda Moran. Biochemical Engineering Group, Department of Chemical Engineering, University of Wales, Swansea, ...
Electrodialytic Polarization of Ion-Exchange Membrane Systems by H. P. Gregor and Marvin A. Peterson'. Department of Chemistry, Polytechnic Institute of Brooklyn, Brooklyn, New Yolk. (Received February 89, 1964). The extent of electrodialytic polariz
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V. J. FRILETTE
The changes with time noted in Fig. 5 are greater than would be expected if the entire solution in each half-cell remained a t uniform concentration. Chloride ion transfer rates of the order of gram ions per hour are to be expected. Hence it is supposed that the major concentration changes resulting from diffusion must be limited t o small volumes adjacent to the membrane surfaces. This view is confirmed by the measurements illustrated in Fig. 6. I n this experiment the solution in the cell was stirred rapidly a t four minute intervals. The cell solutionb were not changed and the potentials were measured with the solutions at rest in the cell. As may be seen the original e.m.f. could be restored at will by mixing. However, it should be noted that on the basis of the above discussion the highest e.m.f. obtained is by no means the reversible e.m.f. for the cell reaction considered. I n the dilute solutions used for these measure-
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ments we concluded that reversible e.m.f. values within 0.1 mv. have been measured only for membrane cells exhibiting a potential >9S% of the ideal value. For these membranes the deviation is almost entirely because of reversible water transfer. The chloride transference number is almost negligible. For membrane cells showing a potential
