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The uranyl nitrate (UN) in 2 kg of a 20 wt% aqueous solution is extracted with...

The uranyl nitrate (UN) in 2 kg of a 20 wt% aqueous solution is extracted with 500 g of tributyl phosphate. Assuming water and TBP are mutually insoluble, and at equilibrium, 1(g UN/g TBP) = 5.5(g UN/g H2O), calculate and compare the % recoveries for the following alternative procedures: (a) a single-stage batch extraction; (b) three batch extractions with 1/3 of the total solvent used in each batch (solvent is withdrawn after contacting the entire UN phase); (c) a two-stage, co-current extraction; (d) a three-stage, countercurrent extraction; (e) an infinite-stage, countercurrent extraction; and (f) an infinite-stage, crosscurrent extraction

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