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During this process, there were some crystals that got blown away by the wind and some crystals poured on the desk too. Aspirin Synthesis and Analysis Revised: 12/13/14 • Crush an aspirin tablet and place in a labeled, pre-weighed vial or test tube. For preparation of Aspirin, acetic anhydride is added to the measured amount of salicylic acid. Preparation and Purification of Aspirin Lab, Aspirin Synthesis and Characterization LAB REPORT, Carmel High School • CHEMISTRY AP Chemist, University of Fort Hare • SCIENCE PAC 213, Borough of Manhattan Community College, CUNY, Borough of Manhattan Community College, CUNY • CHEM 240. It is the addition of water when carrying out suction filtration. A useful synthesis of acetylsalicylic acid was developed in 1893, patented in 1899, marketed under the trade name of “aspirin” by the Bayer Company in Germany. The % yield of the aspirin was 132%. Therefore, from this I learn that I must be more alert when I carry out suction filtration to avoid unnecessary hassle and inaccuracy of results and calculation. It is used in polymer industry. endobj This lab will require you to calculate the percent yield of the aspirin synthesis. Pay attention to the synthesis reactions in this experiment. All work is written to order. Warmed. The reaction in which a Carboxylic acid combines with an alcohol in the presence of a catalyst (commonly concentrated sulphuric acid) to form an ester [CH3COOC2H5] is called Esterification reaction. aspirin product as well as a commercial aspirin tablet will be compared to a standard 0.15% ferric-salicylate solution. There were some experimental errors that have caused variation in my results compared to the theoretical solutions. A fume hood is a large piece of equipment five enclosed sides of a work area, the bottom of which is most commonly located at a standing work height. Water is added once removed from heat with addition of cold water and suction filtration is carried out. Aspirin is an ester that has high molecular weight and it not soluble in water hence the solid can be separated by crystallization process. This experiment can be completed relatively quickly. Part B. Aspirin is a drug that is usually used to relieve minor aches and pain and other medical uses such as anti-inflammatory medication. You will then use correct technique to note the odor. 1 0 obj Mixture is heated for 10 to 15 min to complete reactions. This reaction is the reverse of the synthesis reaction. However, the low percent yield can also mean that the reactant has not reacted completely or the reaction is not complete. Do not lose this container or its contents, you will use them later. Below or a list of items you will need for lab. Weight is recorded. Synthesis of Aspirin … However, you may find these cheaper on sites like Amazon (links below). Aspirin is a derivative of salicylic acid that is a mild, nonnarcotic analgesic useful in the relief of headache and muscle and joint aches. The aspirin crystals are packed into the small capillary tubes and make sure they are all compressed without air gaps. compare the polarity of other components of the reaction (salicylic acid and crude product)3. This includes detailed guides for the pre-lab, data sheet, post-lab, and quiz questions. (synthesis of methyl salicylate) can be done quickly by having one lab member complete the procedure while others complete part A. Methyl alcohol, ethyl alcohol, and isopropyl alcohol, for example, all have some properties in … Esterification reaction is used in the manufacture of paints, varnishes, lacquers, medicines, dyes, soaps and synthetic rubber. This could be a number of reasons such as impurities or that the sample was not completely dry. ��_�����߳/�(�>�w����Q�}�����{����=��'9ޑ\%]��W�d ��U\E��{�� ?�).�a�� �q�L���+EY��@I�4��� N The percent yield was about 76.7% whereas the temperature range is between 134.2 to 136.1 ÌŠÌŠC. Aspirin is primarily used to treat pain as well as to avert cardiovascular disease. Biology The percent yield of the aspirin obtained from my experiment is 46.3% yield. Sign up to receive new content and updates from UH Science Resource. ;��. That means the amount of salicylic acid you use will determine how much aspirin you will make. This is because significant amount of time is required for the sample to dry and yield reasonable results. endobj Must be worn at the start of the experiment and until leaving. We're here to answer any questions you have about our services. Study for free with our range of university lectures! We have also included parts of the lab that may give you difficulties, potential bottlenecks and workarounds so you can finish the experiment efficiently. Disclosure: This page may contain affiliate links that earn this website a small commission, at no cost to you. From this experiment, I have learnt how to carry out suction filtration in the right way and to be cautious at all time when handling chemicals and so on. This is not an example of the work produced by our Essay Writing Service. Esters are widely used in fragrance and flavour industry. Protect the environment from emission of harmful products. Firstly, after the obtaining the crude product from the first suction filtration, we had to transfer it to the conical flask to carry out recrystallisation. Honor chemistry students. Third, we will produce an ester. However there is also another possibility for the lower percent yield value. The solvent was a nonpolar 9:1 mixture of ethyl acetate and methylene chloride respectively3. All addition of chemicals to aspirin is done in the fumehood. The experimental yield percentage is different from the theoretical percentage is because there is loss of product often occurring during the isolation and purification steps. Company Registration No: 4964706. Any names, logos, brands, and other trademarks or images featured or referred to within the website are the property of their respective trademark holders. .It is also useful in organic chemistry for the test of alcohols and carboxylic acid. A percent yield that is more than 100 means that you have more than what you were supposed to get. The synthesis of aspirin is a multi-billion dollar a year chemical. The name aspirin was invented by the chemist, Felix Hofmann, who originally synthesized acetylsalicylic acid for … chemlab4 - Abstract The purpose of this experiment was to synthesize aspirin from salicylic acid and acetic anhydride The yield was calculated and the, 3 out of 3 people found this document helpful, The purpose of this experiment was to synthesize aspirin from salicylic acid and acetic, anhydride. Part C is dependent on how fast you can complete part A since it requires the sample yielded to analyze. The synthesis reactions may also appear on your quizzes. This expected value will be compared to the amount obtain from your experiment to calculate percent yield. If the salicylic acid has been thoroughly converted. This can be seen from the calculation made based on my experiment using this formula. In this experiment, the percent yield is 76.7% yield which shows that it is almost fully pure and contains lesser impurities. *You can also browse our support articles here >, Protect the user carrying out the experiment. Aspirin is an ester that has high molecular weight and it not soluble in water hence the solid can be separated by crystallization process. �������zhNes6��0%��&�YD��=�&N��e�f*�7߿[���~A���|7� ]�I,p��$��Ej��y7K�̐����p$���Y3���řE��Ѳ�,~�_5Ou�[-��F�a-@���o8�����H�G?q(I�g���� �Y����\�}d$�Ol %��������� However, there will be some environmental effects that will still affect the experiment to a small extent. You will then add salicylic acid to one and your synthesized from Part A in another test tube. Aspirin is a drug that is usually used to relieve minor aches and pain and other medical uses such as anti-inflammatory medication. It is recommended you complete this part first to give it the most time to dry. It is reversible reaction and they product sweet smelling products. %PDF-1.3 Fumehood is a local ventilation device that is designed to limit exposure to hazardous or noxious fumes, vapours and dust. Synthesis of Aspirin is known as esterification. B. Aspirin Synthesis 1. Reference this. Percent yield is calculated by dividing your actual yield (mass of aspirin you made) with the expected or theoretical yield (mass you calculated) multiplied by 100. Level. The amount of salicylic acid used will be the limiting reagent and dictate how much aspirin will be synthesized. Percent Yield = (Actual Yield ÷ Theoretical Yield) x 100. • Take a small amount of the aspirin tablet and dissolve as much as you can in 3 drops of ethyl acetate. Synthesis of Aspirin By: Jon Torre Purpose: To determine which of four catalysts yields the fastest reaction rate in the acetylation of salicylic acid (1) to form acetylsalicylic acid (2). Since the values are quite near, this shows that the aspirin we obtained is quite pure and hence contained less impurities. 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. 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 website then please: Our academic writing and marking services can help you! << /Length 4 0 R /Filter /FlateDecode >> The theory melting point is 140 ÌŠC and the experiment melting point range is 134.2 ÌŠC to 136.1 ÌŠC. The temperature of an alcohol thermometer was equilibrated in a beaker of room temperature tap water. Aspirin is an ester that has high molecular weight and it not soluble in water hence the solid can be separated by crystallization process.

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