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Solubility of PEG in 4 M halide solutions. (A) PEG solubility as a function of different molar fractions of KF, KBr, and KI in KCl solution. (Inset) The zone of the anomalous molar fraction effect for KI/KCl mixtures visualized at higher resolution. (B) Solubility of PEG at 1:1 (M/M) KX/KCl ratio, where X represents F−, Br−, or I−. (Lines) Guide for the eye. Total salt concentration was 4 M. (Data points) Means of 5–8 separate experiments ± SD.
