synthesis of aspirin.doc

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Chemistry & Chemical Biology
CHEM 2313

Melissa Johnson Luke Harris 10/30/2007 Submitted 11/06/2007 Synthesis of Aspirin Objective The goal of this experiment is to synthesize acetylsalicylic acid (aspirin). Reactions Calculations Procedure One gram of salicylic acid was placed in two test tubes and two milliliters of acetic anhydride was then added to each tube. Two-tenths of a gram of sodium acetate was added to one of the tubes. Five drops of concentrated sulfuric acid was added to the other tube. The solids in the tubes were dissolved by placing the test tubes in a hot water bath. Both tubes were then poured into a single beaker and mixed. The mixture was the cooled to form crystals and filtered using vacuum filtration. The resulting crystals were then dissolved in water, with ligroin added and placed in an ice bath. After crystals formed, vacuum filtration was used to separate the crystals. Observations The reaction with sulfuric acid is a faster reaction. As soon as the sulfuric acid is added, the test tube warmed up and after some time, turned a yellowish color. When
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