Synthesis of aspirin lab report errors. What are the possible sources of error in synthesis of... Free Essays 2022-12-07
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Aspirin Synthesis Lab Report
This new wonder pain killer was found in Meadowsweet Spiraea ulmaria , a wild flowering plant that grows on riverbanks over much of Europe. The red light will turn on indicating active heating. The phenol group in salicylic acid is replaced by a carboxyl group through electrophilic substitution. Once solid dissolved, weigh the watch glass and filter paper, use the filter paper to carry out suction filtration, place crystals on watch glass, weigh the dried crystal and calculate the weight of the aspirin. We used the method of reacting salicylic acid with acetic anhydride and and a trace amount of acid. This mixture was swirled every minute or two for ten minutes. The experiment deals with the …show more content… When the salicylic acid was weighed in the beginning, weighing paper was supposed to be used to weigh the salicylic acid on balance, but instead a lab paper was used instead.
Free Essay: This is a lab report on the "Synthesis of Organic...
Figure 1: Salicylic Acid + Acetic Anhydride ACETYLSALICYLIC ACID + Acetic Acid EXPERIMENTAL: There were plenty of. This can be solved by heating the filter paper for a longer period of time. It is the addition of water when carrying out suction filtration. This is due most likely to the many errors, most of which are solvable, that can occur during the procedures. Then, determine the melting point of aspirin using necessary apparatus. Quiñones Chemistry Teacher In Partial Fulfillment of the Requirements In Science and Technology III Chemistry Presented by: Kenneth Ivan P. Melting point is determined by using the optimelt melting apparatus.
Measure out about 0. The main procedures are preparation of aspirin, recrystallisation of aspirin and lastly determining the melting point of the aspirin. Aspirin is a very popular product in the pharmaceutical industry because it is both an analgesic and antipyretic which is a painkiller and reduces fevers. When it was time to weigh the filter paper after the dry aspirin was scraped off, the error could be that the water which was likely to still be in the filter paper this could have added more weight to the filter paper alone. The experimentally determined melting temperature of 132. Store the run by tapping the File Cabinet icon in LabQuest, or choosing Store Latest Run from the Experiment menu in Logger Pro. Since this esterification reaction is not spontaneous, sulfuric acid was used as a catalyst to initiate the reaction.
What are the possible sources of error in synthesis of... Free Essays
APPENDIX: The mass of acetic anhydride is necessary to calculate the limiting reagent which leads to out percent error. Prepared the filter paper in a funnel and filtered off the precipitate. When you are finished with this step, stop data collection. Discard the cuvette contents as directed by your instructor. In this experiment aspirin, also known as acetylsalicylic acid, was synthesized from salicylic acid and acetic anhydride.
Another solution is that in step 5 of the lab3 page 44 one could try to wash down the aspirin with four small 5mL portions of water rather than two large 10 mL portions as stated in the lab manual. The reaction equation is shown below. Sulphuric acid is added to the mixture and is swirled. To purify the crude product by Recrystallization. Human errors, such as inaccurate measurements due to negligence could also affect the results. Recorded the weight on the data table.
After heating, then cooling and scratching the solution, a white precipitate formed. Therefore, the expected outcome of the reaction was Antacid Acid Experiment After putting it into the test tube we noticed that it changed colour slower than the lemon juice. Salicylic acid is toxic in large quantities but in small doses can be useful for food preservatives and as an antiseptic. You are now ready to collect data for the five standard solutions. Much of this is believed to be due to decreased production of prostaglandins and thromboxanes. The salicylic acid was a find, white solid powder. Using a literature source or the internet, find the accepted melting temperature value of pure acetylsalicylic acid.
For the sample data, the calculations are as follows. To find the yield percentage we take the mass of the ASA and divide it by the experiment calculated mass of ASA. Introduction Felix Hoffmann, a German chemist, produced a stable form of acetylsalicylic acid, more commonly known as aspirin; in 1897. Set up a vacuum filtration using a Büchner funnel. The percent yield is the actual yield of a product given as a percentage of the theoretical yield Kirk, 2013. End of the experiment, heating the precipitate allowed it to dry and form an end "powder" substance of purified aspirin. Three different products were used; however, the products used were for different types of symptoms.
However, the low percent yield can also mean that the reactant has not reacted completely or the reaction is not complete. By obtaining the percent yield of the synthesis process it was able to infer some conclusions regarding the efficiency of the techniques performed. Choose Linear as the Fit Equation. Also, some of the product was lost because some of the cinnamic acid…. May be harmful if swallowed. Rinsed the dirty apparatus thoroughly with lots of water. The myrtle leaves were also found to contain salicylic acid.
If one does not dry the paper enough, then the residual moisture on the filter paper could make the weight measurements inaccurate. Moderately toxic by ingestion and inhalation. Prepare five standard solutions of varying concentrations of salicylic acid. Conduct a spectrophotometric analysis of your aspirin sample. . Transfer the salicylic acid to a 250 mL beaker and add 10 mL of ethanol. Bayer Aspirin — 6.
Organic Synthesis Of Aspirin Chemistry Formal Lab, Sample of Essays
The percent yield of the aspirin obtained from my experiment is 46. Henri Leroux had improved the salicin extraction procedure to obtain about 30g from 1. Aspirin Synthesis and Analysis Lab Report Malia Mandl Partner: Cosette Motta TA: Zhipeng Zheng Purpose: The purpose of this lab is to synthesize aspirin and measure its impurities. The whole reaction is catalyzed by phosphoric acid. Water is added once removed from heat with addition of cold water and suction filtration is carried out.