Effect of Viscosity on Ionic Mobilities


IN the course of some measurements of electrolytic conductivity, I have determined the effect of increasing concentrations of phenol upon the equivalent conductance of a very dilute solution of hydrochloric acid in water at 25°. Using the viscosity data of Swearingen1, m is found to be 1·000 in the equation λ' = λFm, where λ' is the measured equivalent conductance, λ the predicted equivalent conductance in the absence of phenol, and F the relative fluidity of the phenol solution. Above 0·30 normal phenol concentration, m becomes increasingly less than 1. Stokes's law would predict m = 1. The concentration of hydrochloric acid was 10-4 normal.


  1. 1

    Swearingen, J. Phys. Chem., 32, 785 (1928).

  2. 2

    MacInnes and Shedlovsky, J. Amer. Chem. Soc., 54, 1429 (1932).

  3. 3

    Davies, Phil. Mag., 4, 249 (1927), and “The Conductivity of Solutions” (1933), p. 141.

  4. 4

    Green, J. Chem. Soc., 93, 2023 (1908).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

BELCHER, D. Effect of Viscosity on Ionic Mobilities. Nature 140, 810 (1937). https://doi.org/10.1038/140810a0

Download citation


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.