73. The boiling point of acetone is 56°C, and of methyl alcohol 65°C. These substances form an azeotropic mixture with a boiling point of 55.95°C containing 86.5 acetone. What will be distilled when distilling mixtures containing:
a) 20 acetone and 80 alcohol,
b) 90 acetone and 10 alcohol, and what will remain in the residue?

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