74. Calculate how much phenol can be extracted from 500 ml of an aqueous solution of phenol with C (C6H5OH) \u003d 0.4 mol / l by shaking it twice with 100 ml of amyl alcohol, if at 25 C a solution containing 10.53 g / l of phenol in amyl alcohol, is in equilibrium with an aqueous solution of phenol, the concentration of which is C \u003d 0.658 g / l.

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