Isolation of Caffeine from tea lab question: After introducing 1.0 g of potassiu

Question

Isolation of Caffeine from tea lab question:

After introducing 1.0 g of potassium carbonate into the centrifuge tube containing the hot water extract, it was capped, shaken, and then cooled to room temperature. Following this roughly 3 mL of dichloromentane was added and the mixture shaken for one minute. Why wasn't the dichloromethane placed in the centrifuge tube with the potassium carbonate and the warm extract in one step? Hint: check the boiling points. where do the carboxylic acids end up?

Explanation / Answer

that is because dichloromethane is quite volatile, its boiling point is 39.6

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