Preparation and Recrystallisation of Aspirin

The objectives of this experiment atomic number 18 to conduct the preparation of simple total compound ( acetylsalicylic acid), perform recrystallisation to purify the compound using radiation syndrome diagram filtration and reinforce the skill of determinating melt down 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 then mixed with a few drops of heavy sulfuric acid. The medley is heated until it has completely reacted. After that, distilled piddle 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 staring(a) 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 desi ccator to cool. The evaluate yield and lot yield of the recrystallised aspirin can be calculated after the crystals are weighed. Lastly, melting point is resolved 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 verbalize to be cxlºC.

Thus, it shows that there are still approximately impurities in the aspirin obtained and the reasons might be due to most errors made. 2.IntroductionAspirin, or likewi se known as acetylsalicylic acid is commonl! y used as antipyretic to reduce fever, as pain pill 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 diplomacy or encumber heart attacks, strokes and angina. Aspirin was first originated nigh 400 B.C when... If you expect to get a full essay, rig it on our website: OrderCustomPaper.com

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