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A solute with a partition coefficient of 3.5 is extracted from 10.0 mL of phase 1...

A solute with a partition coefficient of 3.5 is extracted from 10.0 mL of phase 1 into phase 2.

What volume of phase 2 (in mL) is required to extract 99% of the solute from phase 1 in a single extraction?

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