Synopsis The purpose of this experiment was for students to prepare some candid organic fertiliser deepen and to purify the compound by recrystallisation. This experiment allowed the students to give the synthesis of acetylsalicylic acid, acquire the skills of recrystallisation using practice filtration and reinforce the proficiency of the run point determination. The method occasion to synthesize acetylsalicylic acid was esterification by reacting salicylic acid with acetic anhydride with the strawman of dehydrating agent, conc. sulphuric acid, to festinate up the reaction. Having obtained the crude aspirin which was equable impure, recrystallisation was conducted to remove the impurities. The aspirin harvested at the end of the experiment was 1.19g with the lot yield of 37.8%. The melting point observed from the product ranged from 133°C to 137°C. Introduction Acetylsalicylic acid or comm only(prenominal) known as aspirin is an organic compound belong to este r group with condensed structural command of CH3COOC6H4COOH. (2) (2) C6H4(OCOCH3)COOH 3D baby-sit of chemical structure of aspirin aspirin derived from salicylic acid is categorized as nonsteroidal anti-inflammatory drugs or NSAIDs. It is commonly utilize to centre pip-squeak pain and aches (analgesic), turn down feverishness (antipyretic), thin the blood (anticoagulation), slim the inflammation much(prenominal) as rheumatism and arthritis (anti-inflammatory), enhances the elimination of uric acid (uricosuric) and tailor the risk of stroke, heart attack and another(prenominal) heart problems in long-run low-doses. The related compound of aspirin from willow struggle (Salix alba) has been used to relieve pain and reduce fever since hundred of long time a go. The Chinese used the willow speak as a remedy in 500 BC term the record that willow bark could ease aches and pains and let down fever was written b y Hippocrates, a Greek medical student in 4! 00 BC. However, it was only until 1763 when the Reverend Edward Stone find the effectiveness of willow bark in reduce fever In... If you want to get a estimable essay, order it on our website: OrderCustomPaper.com
If you want to get a full essay, visit our page: write my paper
No comments:
Post a Comment