## diffusion potential

https://doi.org/10.1351/goldbook.D01729
For an ideal @D01739@, $$\Delta \mathit{\Phi }_{\text{d}}$$ is the integral of $$\nabla \mathit{\Phi }$$ (given by the following equation) across the boundary between two regions of different concentrations. $\nabla \mathit{\Phi }=\frac{R\ T\ \sum D_{i}\ z_{i}\ \nabla c_{i}}{F\ \sum s_{i}^{2}\ D_{i}\ c_{i}}$ where $$D_{i}$$ is the @D01719@ of species $$i$$, $$z_{i}$$ is the @C00993@ of species $$i$$, $$c_{i}$$ is the concentration of species $$i$$, $$R$$ is the @G02579@, $$T$$ is the @T06321@, and $$F$$ is the @F02325@.
Source:
PAC, 1981, 53, 1827. (Nomenclature for transport phenomena in electrolytic systems) on page 1838 [Terms] [Paper]