To export a reference to this article please select a referencing stye below: If you are the original writer of this essay and no longer wish to have your work published on the UKDiss.com website then please: Our academic writing and marking services can help you! Already a member? Describe in your own words what happens in each of the five main types of chemical reactions. This is not an example of the work produced by our Essay Writing Service. From both the calculations, I can evaluate that the aspirin is relatively pure to a however due to some experimental errors or improper techniques practiced, the percent yield is not up to expectation and moreover the incompletion of reaction might also be one of the reasons to the results obtained in this experiment. What separates the two halves of the reaction? All work is written to order. 1 mole of salicylic acid gives 1 mole of aspirin. Biology Sign up now, Latest answer posted November 09, 2015 at 2:32:23 AM, Latest answer posted March 25, 2015 at 1:09:57 AM, Latest answer posted May 10, 2016 at 9:49:14 PM, Latest answer posted March 03, 2013 at 2:51:16 PM, Latest answer posted May 09, 2016 at 2:26:02 PM. Calculate the percent yield of aspirin if you obtained 0.456 g of aspirin when you started with 0.6906 g of salicyclic acid. Free resources to assist you with your university studies! According to my experiment and the results, i conclude that my end product is not really pure. It can also be used for a little complex treatment such as prevention of blood clots and prevent heart attack and stroke (Aspirin and Heart attacks 2005). The aspirin formed will be contaminated with acetic acid and must be purified by recrystallization. The reaction, using molecular formulas is C7H6O3 + C4H6O3 - … All the chemicals must be handles in the fumehood to prevent any corrosive chemicals such as salicylic acid, acetic anhydride and sulphuric acid to be in contact with our body. The theoretical melting temperature is 140 ÌŠC. Aspirin is a derivative of salicylic acid that is a mild agent that reduces pain by relieving headache and muscle and joint aches (History of aspirin 2011). As for recrystallisation of aspirin, collected crude product prepared in preparation of aspirin which is impure is dissolved in ethanol and hot distilled water is added to the solution. The higher the yield percentage, the higher the purity of the aspirin will be. Get step-by-step explanations, verified by experts. Therefore we had to suction filtrate the whole mixture in the filter flask and hence, this might have led to presence of more impurities or lose in product. The major experimental findings are that, accuracy and attentiveness is very important in this experiment to obtain aspirin that is pure. Looking for a flexible role? Finally the objective of the experiment is met and the results were acceptable as it is quite accurate.