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Unformatted text preview: Hot Plat e 20 g Cr ushed I ce I ce Wat er I ce Bath Filt er Funnel Suppor t Stand with Ring Clamp Filt er Paper Electronic Scale 600-mL beaker Conical Flask Hot Water Mixture (SA + AA)* Hot Plat e Salicylic Acid and Acetic Anhydr ide e mass of the acetylsalicylic acid is: 8.1g SA 180.1g/mol ASA g SA X X = (4g SA ) (180.1g/mol ASA ) 138.1g SA X = 5.2g ASA Preparation of an Ester - Aspirin Abstract This laboratory report investigated the synthesis of acetylsalicylic acid, otherwise known as aspirin. The aspirin was prepared using a mixture of salicylic acid and acetic anhydride with concentrated sulfuric acid. This was heated via a hot-water bath and then after fifteen minutes it was cooled using an ice water bath. The mixture precipitated and formed white crystals. Afterwards, the mixture was filtered through filter paper and then left for one day to dry. When the filter paper and the formed aspirin were completely dried, they were measured and a percentage yield of 65.3% was calculated. Safety precautions were taken when handling the substances and the aspirin produced was not to be consumed. Overall, the investigation delivered all of the intended information and provided the needed conclusions. Objective In this lab activity, the objective was to use the knowledge of esters to synthesize aspirin from salicylic acid and acetic anhydride. The knowledge of percentage yield was also implemented in calculating the amount of aspirin created. percentage yield was also implemented in calculating the amount of aspirin created....
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- Fall '07
- Carboxylic acid, Salicylic acid, Acetic anhydride, 3.4g