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diffusion potential

For an ideal dilute solution, Δ Φ d is the integral of ∇ Φ (given by the following equation) across the boundary between two regions of different concentrations.
∇ Φ = R T ∑ D i z i ∇ c i F ∑ s i 2 D i c i
where D i is the diffusion coefficient of species i,z i is the charge number of species i,c i is the concentration of species i,R is the gas constant, T is the thermodynamic temperature, and F is the Faraday constant.
PAC, 1981, 53, 1827 (Nomenclature for transport phenomena in electrolytic systems) on page 1838
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.D01729.
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