Preparation and Recrystallisation of Aspirin

The objectives of this experiment be to conduct the preparation of simple constituent(a) compound ( acetylsalicylic acid), perform recrystallisation to purify the compound using shaft diagram filtration and reinforce the skill of determinating liquescent point of recrystallised compound. In exhibition to prepare acetylsalicylic acid (aspirin), salicylic acid is firstly weighed and acetic anhydride is followed to be added. It is and then mixed with a few drops of unvoiced sulfuric acid. The medley is heated until it has completely reacted. After that, distilled urine is conservatively added when it is still hot. Additional cold water is then added and the mixture is stirred and rubbed. Suction filtration is carried out to collect the result. The pugnacious product is to be recrystallised and is done by dissolving it in grain alcohol and hot water. After the solution is cooled, the crystals are filtered and dried in the oven. They are then transferred to a desiccator to c ool. The anticipate yield and lot yield of the recrystallised aspirin can be calculated after the crystals are weighed. Lastly, melting point is mulish to check if the aspirin obtained is pure enough. From the experiment, the weight of dry recrystallised aspirin is 1.13 g plot the percent yield is 36.29% yield. The temperature range of its melting point is 138.2ºC ? 141.4ºC. The theoretical melting point is utter to be cxlºC.

Thus, it shows that there are still any(prenominal) impurities in the aspirin obtained and the reasons might be due to close to errors made. 2.IntroductionAspirin, or likewise known as acetylsalicylic acid is ordinarily used ! as antipyretic to reduce fever, as analgesic to relieve assiduity and aches, and also used for anti-inflammatory medicinal drug to reduce swelling, uncomfortableness and redness. Its anti-clotting effect can also dispense or encumber heart attacks, strokes and angina. Aspirin was first originated most 400 B.C when... If you expect to get a full essay, nightspot it on our website: OrderCustomPaper.com

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