CHE 201 lab 4 - Isolation of Caffeine Pre and Post lab Question: 1. Why are extr

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CHE 201 lab 4 - Isolation of Caffeine Pre and Post lab Question: 1. Why are extraction process of natural products useful? How is it used in everyday life every time a cup of tea/coffee is made? 2. What is the role of sodium carbonate in the extraction of caffeine? 3. A student neglected to add sodium carbonate when extracting the tea leaves with hot water. Yet a very high yield of caffeine was obtained. The crystals melted at 202 - 214 degreeC. Explain why. 4. In this laboratory experiment, methylene chloride is used to extract the caffeine. a) Explain what happens to the caffeine during the extraction, and b) why this solvent is the

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