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 + H 2 O), ([Emim][Cl] + LiBr + H 2 O), and ([Emim][Cl]+ LiNO 3 + H 2 O) and also binary system ([Emim][Cl] + H 2 O) 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 φ, 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 φ 0, are also calculated. Our results showed a negative transfer volume of [EmimCl] from water to the aqueous LiCl, LiBr, and LiNO 3 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.