Next, NaOH was used to titrate commercial aspirin tablets — one tablet of aspirin, weighing mg, was dissolved in methanol, and then 10 mL of DI water and 4 drops of phenolphthalein indicator were added. Taking this into account, the actual mass of the purified aspirin product is reduced to 0.
Another laboratory technique used in this experiment is recrystallization.
The organic molecule actually synthesized in this experiment is Acetylsalicylic Acid, commonly known as Aspirin. Turn the capillary tube back to the upright position. In a mL Erlenmeyer flask add 5 mL of acetic anhydride, 1. Another laboratory technique used in this experiment is vacuum filtration.
The calculations for percent yield was shown in Table 6. The impurities that could be in the purified aspirin product could be salicylic acid and other compounds that contain a hydroxyl group on a benzene ring and are known as phenols.
The starting reading of NaOH was recorded. Now place the crude product from the weigh boat in a 25 mL Erlenmeyer flask and add 3 mL of ethyl acetate.
The percent yield of purified aspirin product was 5. Aspirin became commercially available in and today it is estimated that over a trillion aspirin tablets have been consumed by those in need of its curative effects.
The information we gather will allow us to determine the percent yield of the crude aspirin product and of the purified aspirin product. The first factor that caused a low percent yield was caused because we lost some crude product when we were moving our crude product from the weigh boat to the 25 mL Erlenmeyer flask.
The crystals were then washed three times with the vacuum using 5 mL amounts of DI water. Due to apparent wetness of the product it is estimated that half of the mass is due to moisture.
Use the remaining 20 mL of DI water in the mL beaker to rinse out the mL Erlenmeyer flask and wash the product in the Buchner funnel. To measure an amount of a liquid, the liquid to be measured is poured into the graduated cylinder.
By calculating the theoretical yield based on the original amount of Salicylic acid, one could determine the actual yield percentage of the reaction. As such, any reactant that exists in an amount more than this whole number ratio is known as an excess reactant and some will be left over when the reaction is completely finished.
The end point reading of NaOH was recorded. The results of the phenol test were that test tube A, which contained crude aspirin product, had no change in color and remained orange upon adding iron III chloride.
A few concepts are understood to be known in this experiment. To purify the crude aspirin product a recrystallization procedure was performed. After cooling in an ice bath which further facilitates recrystallization and purificationthe mixture was then suction filtered.
Place the 25 mL Erlenmeyer flask containing the product and ethyl acetate directly on the hot plate at 50 degrees Celsius. A Melt-Temp apparatus is used in this experiment as well in order to find the melting point of the synthesized substance.
The first of these that is used is the procedure of weighing by difference. After the reaction was complete some unreacted acetic anhydride and salicylic acid was still be present in the solution as well as some sulfuric acid, aspirin, and acetic acid.
Crystallization can also be induced by adding some already-formed crystals from another solution. To do this, place an arbitrary amount of the substance to be weighed greater than the desired amount on the Fischer balance and press the tare bar to reset the balance to zero.
There are many instruments that can be used to measure liquid amounts that differ in measuring capacity and accuracy, but the one used in this experiment is the graduated cylinder. Synthesis of Aspirin.
Lab Report Synthesis and Characterization of Aspirin (Acetylsalicylic Acid) The Synthesis and Characterization of Aspirin (Acetylsalicylic Acid).
Summary: In this experiment, we produced g of acetylsalicylic acid.
Our theoretical yield was calculated to be g. Synthesis and Characterization of Aspirin - Download as PDF File .pdf), Text File .txt) or read online. Scribd is the world's largest social reading and publishing site.
Synthesis and Characterization of Aspirin Purpose The purpose of this lab was to synthesize Aspirin and measure the synthesized Aspirin’s purity. By calculating the theoretical yield based on the original amount of Salicylic acid, one could determine the actual yield percentage of the reaction.
The Synthesis of Aspirin Chemistry Standard Level Lab Report Data Collection and Processing and Conclusion and Evaluation Date: December 8th, Purpose: The purpose of this lab was to synthesize aspirin, determine the theoretical yield, compare the percent yield to the theoretical yield and test the purity of aspirin by adding Iron (III.
The aspirin was then isolated from the solution using a vacuum filtration apparatus. The percent yield of crude aspirin product was 89%. To purify the crude aspirin product a recrystallization procedure was performed. The percent yield of the purified aspirin product was 5.
77%. 1. Obtain a capillary tube from your instructor, and gently press the open end into the pile of aspirin crystals on the paper so that a few crystals of aspirin enter the capillary tube. 2. Tap the closed end of the capillary onto the bench top, so that the aspirin crystals work their way to the bottom.Synthesis and charactization of aspirin lab report