The answer is (1) distillation. Because the ethanol and water will mix well to form a solution. And the boiling point of ethanol and water are different. Then we can use distillation to separate them.
distillation
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The process used to separate ethanol from a mixture of ethanol and water is distillation, which takes advantage of the different boiling points of the two substances. Ethanol evaporates at a lower temperature than water, allowing it to be collected as a vapor and then condensed back into liquid form. Thus, the correct answer is option A: distillation.
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