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Extraction of Caffeine from Tea, Lecture notes of Literature

University of Evansville (UE)Literature

The literature melting point of caffeine is 238 ⁰C. How does your measure melting point compare? What does the melting point measurement tell you about the ...

Typology: Lecture notes

2021/2022

Uploaded on 09/12/2022

princesspeach 🇺🇸

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Download Extraction of Caffeine from Tea and more Lecture notes Literature in PDF only on Docsity! CHEM 30B Name: ___________________________________ Extraction of Caffeine from Tea Data Mass of tea bag (with leaves, before brewing) Mass of empty tea bag (provided by instructor) Mass of dry 25 mL Erlenmeyer Flask Mass of 25 mL flask with caffeine (after evaporation) Mass of caffeine Appearance of caffeine Melting point of caffeine Calculations 1. Calculate the mass of the tea leaves in the bag and record the result in the space above. 2. Calculate the mass percent of caffeine in the tea leaves. Show your work below. 3. Suppose your tea bag was used to brew a standard American “cup” of tea (which is actually 6 fluid ounces). Calculate the concentration of the caffeine in the beverage in units of mg of caffeine per fl. oz. (Show your work below) Questions:

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