What is the purpose of the aspirin synthesis lab?

What is the purpose of the aspirin synthesis lab?

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.

What is the hypothesis of the aspirin synthesis?

Hypothesis: I hypothesize that salicylic acid will react with acetic anhydride to produce acetylsalicylic acid (aspirin) and acetic acid (vinegar). Variables: Independent and controlled variables: The amount of sulfuric acid used for catalysis and the amount of salicylic acid and acetic anhydride.

What possible errors can be encountered in the laboratory preparation of aspirin?

The possible sources of error in the experiment were: (1) the collected crude aspirin was not dried and immediately subjected to another recrystallization; (2) the Erlenmeyer flask used was not clean, and; (3) the solution did not heat in a steam bath for 15 minutes.

What is the by product of the synthesis of aspirin?

Answer and Explanation: The byproduct of the synthesis of aspirin is acetic acid.

How is aspirin tested for purity in industry?

Because today’s aspirin is mass produced in tablet form, Spectrophotometers are a reliable and economical way to keep the purity of Aspirin consistent throughout the manufacturing process. The purity and amount of acetylsalicylic acid in aspirin can be measured using a Visual Spectrophotometer.

Why is the purity of aspirin important?

It is important to ensure that the purified product is actually Aspirin. This is because if it is not Aspirin, then testing the purity of it will become useless. It is possible for the Aspirin to be converted back into salicylic acid due to hydrolysis.

How is aspirin synthesized?

The Chemistry of Aspirin (acetylsalicylic acid) Aspirin is prepared by chemical synthesis from salicylic acid, through acetylation with acetic anhydride. The molecular weight of aspirin is 180.16g/mol. It is odourless, colourless to white crystals or crystalline powder.

What are the impurities in aspirin synthesis?

The aspirin produced in this activity is not pure. It is often contaminated with salicylic acid, acetic acid, and/or sulfuric acid. Students should not taste their aspirin.

How you produce aspirin in the lab on an industrial scale?

The manufacturing of aspirin is done via the use of a reactor, acetic acid, salicylic acid and the use of an acetic anhydride to complete the reaction….Industrial Manufacture and Testing of an Organic Solid.

Aspirin Range of melting points (degrees Celsius)
Packet aspirin 135-150
Practical aspirin 125-151
Previous year’s practical aspirin 120-151

How are labs tested for aspirin?

The purity and amount of acetylsalicylic acid in aspirin can be measured using a Visual Spectrophotometer. Here’s why: when iron is added to aspirin, it produces violet tetraaquosalicylatroiron complex. To put it simply there is a visible violet color reaction.

How is aspirin tested in the industry?

The solid aspirin will be collected using vacuum filtration. Any other reaction ingredients that are soluble (this includes acetic acid, phosphoric acid, and water) will pass through the filter paper. The collected aspirin will be tested for its purity using FeCl3 (aq).

What is the balanced equation for the synthesis of aspirin?

What is the balanced equation for the synthesis of aspirin? The reaction, using molecular formulas is C7H6O3 + C4H6O3 –> C9H8O4 + C2H4O2. The relevant molecular weights are 180 grams per mole for aspirin, and 138 grams per mole for salicylic acid. An excess of acetic anhydride is used in this preparation.

What is the mechanism of aspirin synthesis?

Based on the mass of salicylic acid (~2 g) determine the maximum yield of aspirin (theoretical yield) from this amount of starting material.

  • Calculate the mass of crude aspirin that you collected.
  • Calculate the percent yield of aspirin =[amount collected/theoretical yield]x 100%
  • What is the melt point of your dried aspirin?
  • Why is pyridine used in the synthesis of aspirin?

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    Are there other reactions for the synthesis of aspirin?

    When aspirin is ingested, it is broken down to salicylic acid by the basic conditions in the small intestine. It is then absorbed into the bloodstream. Aspirin can be made by reacting salicylic acid with acetic acid in the presence of an acid catalyst. The phenol group on the salicylic acid forms an ester with the carboxyl group on the acetic acid.

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