The differences observed in the behavior of both modeled and measured EIS for different ions at the transition frequency (depicted in figure ),despite the close ionic radii, suggest that factors beyond size and basic mobility are influencing the overall impedance response. Variations in ion-solvent interactions, as well as differences in how ions interact with the solvent or other ions in the solution, likely affect the effective mobility. These interactions can significantly impact the impedance behavior, dominantly in transition region.