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Distribution ratios for the solvent extraction of 0.05 mol L–1 ZnX2, with X being Cl– (blue box solid), Br– (brown box), or I– (green ballot box with X), by using 0.2 mol L–1 TOMAX in toluene. Arrows show the maximum extraction efficiency, which shifts to a higher anion concentration when a larger halide ion is used.
