VISCOSITY OF AQUEOUS-ELECTROLYTE SOLUTIONS AND THE TTG-MODEL

An equation covering the dynamic viscosity from zero to high concentrations has been derived on the basis of the TTG model. The equation is compatible with the Eyring and NMR theories and has a similar form to the Othmer-rule equation. A component of the limiting viscosity slope is shown to be proportional to the Falkenhagen slope. The TTG equation was tested for 20 electrolytes of diverse charge type and found to fit the data within the experimental errors. The equation is simply extended to cover pressure, temperature, and component changes. The viscosities of three multicomponent systems are predicted to within the experimental errors. The derived parameters of the equation were found to be simply related to the TTG volume of the solute. © 1979 Plenum Publishing Corporation.