solvent extraction using metal chelarors, Chemistry

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The following information is available for the extraction of
Cu2+ into CCl4 with dithizone: KD,c = 7 ´ 104; b = 5 ´ 1022;
Ka,HL = 3 ´ 10–5; KD,HL = 1.1 ´ 104; n = 2. What is the
extraction efficiency if 100 mL of an aqueous solution of
1.0 ´ 10–7 M Cu2+ that is 1 M in HCl is extracted with 10 mL
of CCl4 containing 4.0 ´ 10–4 M HL?

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