Volumetric properties of aqueous solution of [C3mim][Ac] and [C4mim][Ac] from 283.15 to 323.15 K

The densities of 1-alkyl-3-methylimidazolium acetate [C(3)mim][Ac] and [C(4)mim][Ac] aqueous solution were measured in the concentration from 0.05000 to 3.000 mol.kg(-1) over the temperatures range from 283.15 to 323.15 K. The coefficient of thermal expansion of the solution, a, apparent molar volume, V-phi(B), the apparent molar expansibility of the solute, phi(E) and the partial molar volume were calculated. The Pitzer's model was used to establish an equation to describe the volumetric properties and the corresponding parameters beta((0)V)(MX), beta((1)V)(MX) and C-MX(V) were obtained. Comparing the values of V(B)(0)obtained by Pitzer's method with those values of V(phi)(0)calculated by Redlich and Meyer's shows that Pitzer's formulism can be applied in the aqueous solution of ionic liquids. (C) 2017 Elsevier B.V. All rights reserved.