Study of Apparent Molar Volumes for Ionic Liquid, 1-Ethyl-3-methyl Imidazolium Chloride in Aqueous Lithium Nitrate, Lithium Bromide, and Lithium Chloride Solutions at Temperatures (298.15 to 318.15) K

The densities of ternary systems ([Emim][Cl]+ LiCl + H2O) ([Emim] [Cl] + LiBr + H2O), and ([Emim][Cl]+ LiNO3 + H2O) and also binary system ([Emim][Cl] + H2O) were measured at T = (298.15 to 318.15) K using a vibrating U-tube densimeter. On the basis of experimental density data, the apparent molar volumes, V-phi, were computed. The values of apparent molar volumes for binary system were correlated to Redlich-Meyer and Pitzer equations and for ternary systems were correlated to Redlich-Meyer equation and apparent molar volumes at infinite dilution, V-phi(0), are also calculated. Our results showed a negative transfer volume of [EmimCl] from water to the aqueous LiCl, LiBr, and LiNO3 solutions, which decrease by enhancing the salt mass fraction. The solute-solvent interactions and structure making or breaking ability of [Emim][Cl] have been discussed in details. The results of second derivative of limiting apparent molar volumes showed that the studied ionic liquid in this work acts as a structure maker.