Acid Base Extraction Essay -- essays research papers

Acid Base ExtractionThe purpose of this laboratory assignment was two-fold, first, we were todemonstrate the extraction of acids and dwelling houses, finally, realize whatunknowns were present. Second, we were to extract caffeine from tea. These twoassignment will be documented in two separate entities.Introduction Acid/base extraction involves carrying forbidden simple acid/basereactions in order to separate strong organic acids, weak organic acids neutralorganic compounds and basic organic nerve centers. The process for thislaboratory assignment are on the following pages.3) Separation of Carboxylic Acid, a phenylic acid and a Neutral SubstanceThe purpose of this acid/base extraction is to separate a mixture ofequal parts of benzoic acid(strong acid) and 2-naphthanol(weak base) and 1,4-dimethoxybenzene(neutral) by extracting from tert-butylmethyl ether(veryvolatile).The goal of this experiment was to identify the three components inthe mixture and to determine the percent rec overy of each from the mixture.4) Separation of a Neutral and Basic SubstanceA mixture of equal parts of a neutral substance containing eithernaphthalene or benzoin and a basic substance containing either 4-chloroanilineor ethyl 4-aminobenzoate were to be separated by extraction from an ethersolution. at one time the separation took place, and crystallization was carried out,it became possible to determine what components were in the unknown mixture, bymeans of a melting point determination.ResultsProcedure ObservationsInferenceDissolve 3.05g Phenol Mixture was a golden-Neutral acidin 30ml brown/yellow color t-butyl methyl ether inErlenmeyer flask and transfer mixture to 125ml separatory funnel employ littleether to complete the transferAdd 10 ml of waterOrganic layer=mixtureaqueous layer=water(clear)Add 10 ml saturated aqueous Sodium bicarbonateNaHCO3dissolves in solution sodium bicarbonate... ...spCaffeinesalicylate is a Pasteur pipette while theisolated(white color)formed. bea ker is in the churl bath then vacuum filter.Caffeine beaker51.61g -51.56g.05g = 50mg% yield = .05g x 100% = 20% .25gCaffeine salicylate17.198g -17.036g .062g% yield = .062g x 100% = 25% .25gConclusionharmonize to the HPLC graph that follows, my product was very pure. Theactual melting point of caffeine salicylate is 137 degree(C), my product wasfound to have a melting point of 138 degrees (C). As before, of shape thisexperiment was not done completely error-free, the error is due almost entirelyon human error.