Question: A saturated liquid mixture containing 60 mole % benzene and 40 mole % toluene is to be distilied continuousiy into a distillate product containing 90

A saturated liquid mixture containing 60 mole % benzene and 40 mole % toluene is to be distilied continuousiy into a distillate product containing 90 mole % benzene and the bottom product containing 4 mole % benzene. The fractional distillation column will operate at approximately constant pressure of 1atm. The reflux ratio is 3. How many theoretical plates must the column have if the feed is introduced into the eighth plate? Equilibrium data are

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