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Caffeine Isolation Lab Report

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Caffeine was isolated from tea by a sequence of solvent extractions of hot water and dichloromethane. The solid- liquid extraction, which involved hot water, removed the caffeine from the tea leaf and left behind cellulose and soluble organics. The lab actually began with the liquid- liquid extraction that involved dichloromethane and tea, and partitioned components in the layers based off their solubility in the two solvents. Since caffeine is moderately polar, it dissolves in hot water but more so in dichloromethane. Consequently, the dichloromethane extract contained the crude caffeine. Two grams of anhydrous sodium sulfate were added to the dichloromethane as a drying agent to remove water. The dichloromethane was distilled off and the

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