The amount of caffeine retrieved from the tea was 0.657 grams. The melting point of the caffeine salicylate was 183oC. The followiing questions must be answered and included in your lab report. 1. What is the percent caffeine in the tea leave sample? Show calculations. 2. Given the melting point, is the caffeine salicylate a pure substance or impure substance? Explain your answer. 3. Dichloromethane bottle is empty. A full bottle of methylene chloride is on the cart. Can methylene chloride be used in place of dichloromethane? Explain. 4. In a separatory funnel, two layers are present; an aqueous layer and a dichloromethane layer. Which layer is the dichloromethane layer: top or bottom? Explain how to distinguish the layers. 5. Is calcium carbonate, acidic or basic?
