, and the ionic conductivity and relative ion dissociation are shown in Figure . These RTILs have different groups of cations and anions; therefore, comparing these RTILs with each other regarding ionic conductivity and relative ion dissociation is impossible. However, all have the trend of increasing ionic conductivity and relative ion dissociation with composition, reaching a maximum and decreasing to its neat RTIL value. In addition, the viscosity and relative mobility of cation with a composition are also shown in Figure ) and Figure ) (supporting information) for this RTIL system for understanding the competitive behavior of viscous forces and mobility of free cation. The conductivity profile for ξr also supports the ionic conductivity behavior in EG for these RTIL systems (Figure (f-h) (supporting information)). To understand the dependence of components for the composition of RTILs and ξr in the expression of ξr (Eq. ( )) are illustrated in Figures S4 to S7 (Supporting Information). It could be noted that the expression of ξr in Eq. ( ) is composed of three terms: the first term is dimensionless conductivity, the second term is dimensionless viscosity, and the third term is dimensionless radii. The dimensionless viscosity term has nondissociated properties, including the viscosity of RTIL and solvent representing the viscous forces which could be said to be a type of resistance influencing the movement of the molecules within the solution. Therefore, it has significant characteristics to influence the mobility of the free ions, resulting in ionic conductivity behavior at any composition. Figure (Supporting Information) represents the dimensionless viscosity term concerning the composition of the RTILs and shows that (η0/η∞) xIL increase with the increase of the RTIL concentration in the solution. However, when this term is observed with ξr, it could be observed that with the increase of (η0/η∞) xIL value, ξr increases and reaches maximum then decreases, which explains the ion dissociation phenomena to represent the ionic conductivity behavior of RTIL in molecular solvent (Figure (Supporting Information)). The next is the dimensionless radii term shown in Figure (Supporting Information) for the mole fraction of RTILs. It shows that this term has less influence than dimensionless viscosity since it has almost similar values for every RTILs. However, when plotted with respect to ξr, it showed a similar pattern to get maximum value then declines, which explains the ion dissociation phenomena to represent the ionic conductivity behavior of RTIL in molecular solvent (Figure (Supporting Information)).