A high or even moderate yield was not achieved. Taking this into account, the actual mass of the purified aspirin product is reduced to 0. The melting points may have inaccuracies as the temperature at which the willow bark melted was debated by the group.
Montes, Ingrid, et al. Another way the purity of the sample is tested is through a melting point test on the purified aspirin product. Load the capillary tube into the melting point apparatus and begin heating.
Turn the capillary tube back to the upright position. Phenols form a highly colored complex with iron III chloride that can range from a pale to dark purple depending on the concentration of the phenol group present in the solution.
The sharpness of the melting point is useful to measure purity using pure aspirin as a comparison. This precipitation happens because the solvent can no longer hold all of the solute molecules, and the molecules begin to leave the solution and form solid crystals.
Also leave the remaining 20 mL of DI water in the mL beaker in its ice bath. To purify the crude aspirin product a recrystallization procedure needed to be performed to remove impurities and to further purify it.
This led us to believe that our crude aspirin product did not contain any phenol groups and was pure aspirin. Vacuum filtration was the technique used for separating the solid aspirin product from the solvent or liquid reaction mixture.
Next, the crude product was then purified by adding water which further lowered the solubility of acetylsalicylic acid and dissolved some impurities from the crystal of aspirin. This was an expected result because salicylic acid has phenol groups and when iron III chloride is added it turned dark purple due to the concentration of the phenol groups present in the solution.
Make sure to get as much of the product into the Buchner funnel as possible. From this test it can be seen, to what degree each compound has a phenol impurity.
Once the melting point has been determined turn off the apparatus so it may cool and dispose of your capillary tube in the appropriate waste bin. The aspirin was then isolated from the solution using a vacuum filtration apparatus.
The pure aspirin shows only one spot on the paper, this is because it consists of only one compound, that being 2-acetoxybenzoic acid aspirin. Leave the mL Erlenmeyer flask that contains the mixture in its ice bath and allow it to cool for an extra 5 minutes.
Taking this into account, the actual mass of the crude aspirin product is reduced to 2. Hi there, would you like to get such a paper? The third factor that caused a low percent yield of our purified product was that when we vacuum filtered our purified product, some of our purified product fell through the filter and into the side arm flask.
Heat the 25 mL Erlenmeyer flask in a water bath not to exceed 50 degrees Celsius until all of the product has dissolved. Pure aspirin does not contain any phenol groups and should be unreactive when mixed with the iron III chloride solution and should remain orange in color.Essay about Synthesis of Aspirin Synthesis of Aspirin Salicylic acid derivatives, or salicin, are found in the bark of the willow tree.
In the 5th century B.C., Hippocrates ground the bark into a powder, and later, the Natives Americans chewed on.
Synopsis. The objective of this experiment is to enable us to conduct the synthesis of aspirin, reinforce the skills of recrystallisation and reinforce the.
Essay on Synthesis of Aspirin Words | 22 Pages. 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.
In the first section, the Synthesis of Aspirin, salicylic acid was weight to be grams using mass by difference since it was weighed on a milliliter beaker. milliliters of the acetic anhydride and 14 drops of 85 percent phosphoric acid were added to. The purpose of the experiment was to make acetylsalicylic acid (aspirin) from methyl salicylate (oil of wintergreen).
The amount of acetylsalicylic acid recovered was grams. The percent yield is % of what the theoretical yield was.
Synthesis of Aspirin Lab Report Words | 12 Pages. Abstract: The goal of this experiment was to synthesize aspirin. In this experiment aspirin, also known as acetylsalicylic acid, was synthesized from salicylic acid and acetic anhydride.Download