Experimental data of densities and viscosities of 1-propyl-2, 3-dimethylimidazolium tetrafluoroborate ([PDMIM][BF4])+ H2O binary mixtures were measured over the entire mole fraction range from (298.15 to 343.15) K at atmospheric pressure. Excess molar volumes and viscosity deviations as a function of mole fraction average have been obtained and fitted to the Redlich− Kister equation. Estimated coefficients of the Redlich− Kister equation and ...