Fig. 2.

Normalized conductivity and effective ion concentrations of KCl solutions in the presence of PEG. PEG concentrations range from $0\text{\%}$ to $40\text{\%}$ (wt/wt). Dashed line corresponds to a fit to Eq. 2 with fitting parameter $k=2.66$. Ion selective $K^{+}$ electrode measurements are made on 0.5 M KCl electrolyte solutions, where PEG concentrations range from $0\text{\%}$ to $40\text{\%}$ (wt/wt). Solid line corresponds to a fit to Eq. 3 with fitting parameter $\beta =1.54$.