2. To 100 ml of a solution containing 1⋅10-4 mol/l Ni2+, 10 ml of a solution of 8-hydroxyquinoline in CCl4 was added, and the pH was adjusted to 6, at which the distribution coefficient of nickel is 1200. Find the degree of extraction, the degree of concentration of nickel in organic phase and its residual concentration in the aqueous phase.
Answer: R = 99.2%; 9.92 times; With (Ni2+)w.f. = 8.3×10-7 mol/l.

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