The purpose of this laboratory assignment was two-fold, first, we were to demonstrate the extraction of acids and bases, finally, determining what unknowns were present. Second, we were to extract caffeine from tea. These two assignment will be documented in two separate entities. Introduction: Acid/base extraction involves carrying out simple acid/base reactions in order to separate strong organic acids, weak organic acids neutral organic compounds and basic organic substances. The procedure for this …showed first 75 words of 1513 total…

…showed last 75 words of 1513 total…beaker:         51.61g                   -51.56g                           .05g = 50mg % yield = .05g x 100% = 20%          .25g Caffeine salicylate:         17.198g                   -17.036g                            .062g % yield = .062g x 100% = 25%          .25g Conclusion         According to the HPLC graph that follows, my product was very pure. The actual melting point of caffeine salicylate is 137 degree(C), my product was found to have a melting point of 138 degrees (C). As before, of course this experiment was not done completely error-free, the error is due almost entirely on human error.