A Proposed Interpretation of the Zeta-Potential

Abstract
The method used by Gurney and Fowler in explaining the interfacial potential at a metal‐solution boundary is applied to the zeta‐potential. This gives the ζ‐potential as a straight line function of the logarithm of the concentration, in agreement with the shape of the curves as found experimentally. To obtain exact agreement between theory and experiment, it is proposed that the dielectric constant of the electrical double layer is about 0.6 that of the value for pure water. This assertion can be checked by accurate measurements on the surface conductance of solution of electrolytes.

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