Preparation and Recrystallisation of Aspirin

The objectives of this experiment atomic number 18 to conduct the preparation of simple entire compound (aspirin), perform recrystallisation to purify the compound using radiation sickness diagram filtration and reinforce the skill of determinating melt 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 whence mixed with a few drops of arduous 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 petroleum 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 cool. Th e evaluate yield and lot yield of the recrystallised aspirin can be calculated after the crystals are weighed. Lastly, melting point is primed(p) 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 express to be cxlºC.

Thus, it shows that there are still somewhat(a) impurities in the aspirin obtained and the reasons might be due to some errors made. 2.IntroductionAspirin, or likewise known as acetylsalicylic acid is normally used as antipyretic to reduce fever, as pain pill t o relieve assiduity and aches, and also use! d for anti-inflammatory medicament to reduce swelling, uncomfortableness and redness. Its anti-clotting effect can also cross or encumber heart attacks, strokes and angina. Aspirin was first originated almost 400 B.C when... If you expect to get a full essay, company it on our website: OrderEssay.net

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