MCAT Organic Chemistry Question 170: Answer and Explanation

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Question: 170

5. Which of the following would be the best procedure for extracting acetaldehyde from an aqueous solution?

  • A. A single extraction with 100 mL of ether
  • B. Two successive extractions with 50 mL portions of ether
  • C. Three successive extractions with 33.3 mL portions of ether
  • D. Four successive extractions with 25 mL portions of ether

Correct Answer: D

Explanation:

It is more effective to perform four successive extractions with small amounts of ether than to perform one extraction with a large amount of ether.

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