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The various methods available to synthesize aspirin lead to the need to examine and evaluate production efficiency and purity. The purpose of our experiment was to synthesize aspirin from acetylene anhydride, salicylic acid, and sulfuric acid. And then determine the relative purity of the synthesized sample. The procedure performed in our experiment involved chemically reacting salicylic acid and acetic anhydride in order to form acetylene salicylic acid.

The limiting reactant in this chemical reaction was salicylic acid, with acetic anhydride present in excess in order to react with any water produced during the reaction of the reactants, and thus improves the yield of aspirin. Theoretical yield is 2. 88 g aspirin and the percent yield of the preparation of aspirin was 75. 0%. By obtaining the percent yield of the synthesis process it was able to infer some conclusions regarding the efficiency of the techniques performed. Determining the relative percent yield and attained the actual yield of prepared aspirin as very important to calculate the percent yield.

The chemical reaction and production of salicylic acid was used to comprehend the stated concepts. Introduction The objective of this experiment was to synthesize acetylene salicylic acid (aspirin) from salicylic acid and acetic anhydride and then determine the purity of the samples. And it was a useful method for calculating the limiting reactant. To prepare aspirin, salicylic acid is reacted with an excess of acetic anhydride. A small amount of a strong acid is used as a catalyst which speeds up the reaction.

In this experiment, sulfuric acid will be used as the catalyst. The excess acetic acid will be quenched with the addition of water. The aspirin product is not very soluble in water so the aspirin product will precipitate when water is added. This excess acetic acid in the presence of sulfuric acid was needed in order to determine the percent yield. In this case the molar ratio was very important in which the amount of each starting material would be able to produce only a certain e. The consumption of the limiting reactant has been fully consumed to produce aspiring.

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