Synthesis Of Aspirin

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In this experiment, two organic esters, aspirin or commonly known as acetylsalicylic acid and methyl salicylate (oil of wintergreen) were synthesized through an esterification process and then the purity of some of the molecules was determined through analytical techniques. During part one of this experiment, aspirin was synthesized. Salicylic acid and acetic anhydride were mixed to produce acetylsalicylic acid (aspirin). Typically, acetic acid is used but the reaction with acetic acid is slow and does not go to completion. C7H6O3 (s) + CH3COOH(aq) ⇄ C9H8O4 (s) + H2O(aq)
Therefore, two acetic acids are combined to drive the reaction to completion. Since water is not produced in this reaction, the reverse reaction does not occur and more aspirin is produced. However, only 1.658 of the product was recovered due to error in retrieving all of the aspirin during the filtration of the crystals. This yielded a percent yield of 46%, which is understandable since the product may have not been completely produced thus yielding such a low percent yield. Also, the product may contain a lot of impurities hindering how much product there really is. C7H6O3 (s) + C4H6O3 (aq)→ C9H8O4 (s) + H2O(aq)

Therefore, in part two, part of the sample was placed into one medium test tube and a sample of salicylic acid was added to the other and a solution of 1% FeCl3 was added to each test tube to test for purity. The main impurities in the sample are unreacted
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