Synthesis of Asprin

SYNTHESIS of ASPIRIN PURPOSE: In this experiment is to scram ethanoyl groupsalicylic irate. acetylsalicylic acid is wide-awake by acetyl take ind salicylic acid I a process called esterification. Esterification is the reception of the carboxyl (-COOH) sort, and the -OH group to form a carboxyl ate ester group. In this model the source of the -OH group is the phenolic -OH machine-accessible to the ring of the salicylic acid. The acetyl group comes from acetic acid anhydride, and the response is catalyzed by phosphorous acid. Recrystalization is used in a abstruse solvent of ethyl alcohol and water to purify the crude aspirin. liquescent point determines the relational purity of obtained aspirin. STRUCTURE EQUATION for the SYNTHESIS of ASPRIN: PRODECURE: Refer to the Mohrig Lab-book p. 41-49 RESULTS: measurement of methyl Salicylate = 1.008 g Amount of Acetic anhydride = 2.0 ml draw of aspirin = 0.425 g liquescent commit Range = 115- 122 0C OBSERVATIONS: % pass of Aspirin = [actual yield/ theoretical yield] x c big bucks of Obtained Aspirin = 0.425 g % Yield of Aspirin = [0.425 / 1.008] x 100 = 42.16 % Aspirin was obtained in a 42.16 % Yield from salicylic acid. comparatively concentrated white crystals of Aspirin were obtained. The purity was tested with melt range. CHEMICALS employ: ACETYLSALICYLIC ACID (ASPIRIN): Molecular command: C9H8O4 Molecular tilt: 180.154 Melting pose: 135-136 0C turn predict: 1400C SALICYLIC ACID: Molecular Formula: C7H6O3 Molecular Weight: 138.1226 compactness: 1.44 Vapor Density: 4.

8 Melting header: 158- 162 0C Boiling head up: 2110C at 20 mmHg ACETIC ANHYDRIDE:! Molecular Formula: C4H6O3 Molecular Weight: 102.088 Density: 1.075 g/ml Melting Point: -73.1 0C Boiling Point: 139.50C ACETIC ACID: Molecular Formula: C2H4O2 Molecular Weight: 60.052 Density: 1.0497 g/ml Melting Point:16.6 0C Boiling Point: 117.9 0C CONCLUSION: Salicylic acid was converted into acetylsalicylic acid - Aspirin, which was obtained in 42.16 %... Too hard you didnt include the experimental procedure. (Mohrig Lab-book?) It would have raise me to read how aspirin is produced in a research laboratory. opposite than that, a solid lab report. If you want to get a full essay, order it on our website: OrderCustomPaper.com

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