Densities and Conductivities of Aqueous N,N,N-Alkyloctyldimethylammonium Chloride at Different Temperatures

The simple equations for predictions of the density and conductivity of mixed electrolyte solutions were extended to the related properties of mixed ionic liquid solutions. The densities and conductivities were measured for the ternary solutions OOAC (N,N,N-dioctyldimethylammonium chloride) + OPAC (N,N,N-octylpentyldimethylammonium chloride) + H₂O, OOAC + N,N,N-octylbutyldimethylammonium chloride (OBAC) + H₂O, OPAC + OBAC + H₂O and their corresponding binary subsystems OOAC + H₂O, OPAC + H₂O, and OBAC + H₂O at (298.15, 303.15, and 308.15) K, respectively. The results were used to test the predictability of the extended equations. Comparison of the results shows that these simple equations can be used to predict the density and conductivity of the mixed ionic liquid solutions from the properties of their binary subsystems of equal ionic strength.