Modification of the Equations for the Electro-viscous Effect of Colloidal Electrolytes

Pure Chemistry Department, University College of Science, Calcutta-700 009

Manuscript received 26 September 1977, accepted 14 February 1978

In a previous publication it has been shown how Smolocbowski's equation may be modified to account for the electro-viscous effed of colloidal electrolytes. The constants in the modified equation determined from viscosity data implicitly contained a factor, g. This point has been clarified In the present paper and It has been shown that the same equation can be derived also from Booth's equation on the basis of certain assumptions.

Some of the advantages of the modified equation and those which follow from it have been discussed.

The modified equations have been subjected to test using fresh experimental data collected from the literature and have been found satisfactory.

It has also been shown how the primary eletro-viscous effect varies with the concentration of the colloidal electrolyte In the sol under different conditions.