Prediction of the viscosity of mixed electrolyte solutions from single‐salt data

The viscosities of sonic mixed electrolyte solutions (NaCl + KCl, NaCl, + Nll4NO3, NaCl + CaCl2, NaCl + Ca(NO3)2, NaCl + MgSO4) have been measured to high concentration at 298 K. Existint: viscosity data for the single‐salt solutions have been fitted, as required, to Goldsack's two‐parameter equation. Mixed electrolyte data have been used to test the predictive accuracy of five simple methods of estimation. The usefulness and relative accuracies of the methods have been discussed briefly.