The viscosities of sodium bromide solutions in formamide-water mixtures have been determined at 25, 30, 35 and 40°C. From these data, the β-coefficient of the Jones-Dole equation has been calculated. This coefficient increases gradually with increasingformamide content in the solvent. On the other hand, the ß-values increase with increasing temperature from Xh2o = 0.60 to higher water compositions, showing the opposite trend in the remaining composition range. These changes in theβ-coefficient are interpreted in terms of solvent –solvent and ion –solvent interactions. Finally a comparison of β-coefficient for sodium bromide in formamide-water and dimethylformamide-water mixtures was carried out. © 1983, R. Oldenbourg Verlag.
- Sodium bromide