Mass Transfer
Acetic acid will be most economically separated from a dilute solution of acetic acid in water by

Absorption
Solvent extraction
Continuous distillation
Evaporation

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Mass Transfer
For water-ethanol system, the minimum reflux ratio

Is the optimum reflux ratio
Cannot be computed
Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
Is computed from the intercept of the operating line

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