Simple distillation can be employed to get back the acetone. Since acetone is more volatile, it will separate out first.
Simple distillation is a procedure by which two liquids with different boiling points can be separated. The process of heating a substance until it vaporizes, cooling the vapours, and collecting the condensed liquid is the basis of a commonly used purification technique called distillation.
Simple distillation can be used effectively to separate liquids that have at least more than 25 K
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difference in their boiling points.
Since, the boiling point of acetone is 56°C (329.15 Kelvin) and boiling point of water is 100°C (373.15 Kelvin), and for distillation the minimum difference in temperature should be at least 50°C. Thus, by the process of distillation acetone can be separated.
