1. Calculate the constant of metal extraction into the organic phase, if the volume of the aqueous phase is 100 ml, C(Men+)=1∙10-6 mol/l. The volume of dichloroethane for one-step extraction is 20.00 ml, the concentration of the organic reagent in dichloroethane C(HL) = 1∙10-4 mol/l. The degree of metal extraction is 45 %.

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