lab caffeine - Hoang Phi Hoang Organic Chemistry 203 Lab...

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Hoang Phi Hoang Organic Chemistry 203 Lab Mr. Repa 7/12/11 Title : Extraction of Caffeine from Tea with Methylene Chloride Purpose : The reason for this experiement is to extract most of the caffeine from a tea bag using Methylene Chloride. Equation : Table of Reagent : Name Melting point Boiling point Density Molecular mass Sodium Carbonate 854C 1600C 2.54g/ml 105.99g/mol Caffeine 237C 178C 1.23g/cm3 194.19g/mol Methylene Chloride -97C 40C 1.33g/cm3 84.93g/mol Anhydrous Sodium Sulfate 800C 1100C 1.464g/cm3 142.04g/mol Safety Infomation: Be careful when hadling meethylene chloride. It is toxic solvent and suspected carcinogen. You should not breathe it or spill it on yourself. Wear gloves and work in a fume hood. It is recommended that you use glass centrifuge tubes with screw caps. Check them first with water to make sure that they will not leak while shake them. Dispose of methylene chloride in a waste container marked for the disposal of halogenated organic waste. Dispose of the tea bag in a trash can. Prodedure: Preparing the Tea Solution : 1.place 20ml of water in 50ml of beaker 2.cover the beaker with a glas watch glass and heat the water on a hot plate until it is almost boiling 3.determine the weight of the tea bag
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4.place tea bag into the hot water so that it lies flat on bottom
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lab caffeine - Hoang Phi Hoang Organic Chemistry 203 Lab...

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