Preparation and recrystallisation of aspirin

The flask was removed from the water bath and 1mL of distilled water was added from a dropper to decompose the excess acetic anhydride. Making acetic anhydride in excess, hence there is no salicylic acid left in the product solution.

Despite being effective, it caused digestive problems and even death. What are the different ways. Figure 1 Chemical reaction of Acetic salicylic acid with acetic anhydride Salicylic acid reacts with acetic anhydride when an acid is present as a accelerator In this experiment, sulphuric acid, H2sO4 was used as the catalyst.

The crystal has a light flaky appearance and it is white in colour.

Inorganic and Organic Chemistry – Preparation and Recrystallisation of Aspirin Essay Sample

The crude product was dissolved in approximately 5 ml of ethanol in a ml conical flask. This makes it more difficult for impurities to be included, reducing many impurities present in the final product.

The ground as to why Ethanol and Water was used was in short, that the dissolver that was used must be of sufficient denseness to fade out the acetic acid and Ethanol and Water fits the standards.

Preparation and recrystallisation of aspirin

A clean and dry glass is weighed together with a filter paper. The crystals are so dissolved in 5ml of ethyl alcohol. The crystal and filter paper were transferred onto the weighted watch glass and dried in the oven for approximately 20 minutes.

The crude product was dissolved in approximately 5mL of ethanol in mL conical flask and warmed on a hot plate. This means that we obtain fair result. Next, the crystals and filter paper were being transferred onto the weighed watch glass and were being put in the oven.

An additional of 40 ml of cold water was added to the mixture. After the solution cools and the desired compound crystallizes out, any staying soluble drosss will stay dissolved in the dissolver.

List the two functional groups on salicylic acid and indicate which one is used in the formation of aspirin. To guarantee truth, cold distilled H2O is used to rinse away staying crystals from the filter paper. To sublimate the merchandise farther, there is a demand to recrystallise the petroleum acetylsalicylic acid.

Suction filtration is done to take the Aspirin from the solution. To find out the purity of aspirin obtain by recrystallisation of prepared aspirin from reaction of salicylic acid with acetic anhydride. The mixture is warmed until the solid dissolves wholly in the solution. thesanfranista.comisThe objective of this experiment is to learn to re-crystallise aspirin and to prepare aspirin.

To find out the purity of aspirin obtain by recrystallisation of prepared aspirin from reaction of salicylic acid with acetic anhydride.5/5(1). The Preparation of Aspirin, the Recrystallisation of Aspirin and the Melting Point Determination of Aspirin.

Results At the end of the experiment, the result gotten should be a result of 40 – 60 % yield and a melting point that is around the theoretical melting point of aspirin, which is °C – °C.

Preparation, Purification and Analysis of Aspirin (acetylsalicylic acid) Synthesis: We will prepare aspirin by reacting salicylic acid 1 with an excess of acetic anhydride 2 to produce aspirin 3 and acetic acid 4: recrystallization.

Proceed to the step #5 below. If the FeCl 3 remains yellow, even after. Specific Objective: The experiment is carried out to: Conduct the synthesis of aspirin Reinforce the skills of recrystallization Reinforce the technique of melting point determination 2.

Procedure: Preparation of Aspirin Recrystallization of Aspirin Melting Point Determination of Aspirin 3. Project: Preparation and Recrystallisation of Aspirin Words | 12 Pages SINGAPORE POLYTECHNIC SCHOOL OF CHEMICAL AND LIFE SCIENCES Diploma in Applied Chemistry with Pharmaceutical Science Organic Chemistry (CP/CP) Project Preparation and Recrystallisation of Aspirin.

Preparation, Purification and Analysis of Aspirin (acetylsalicylic acid) Synthesis: We will prepare aspirin by reacting salicylic acid 1 with an excess of acetic anhydride 2 to produce aspirin 3 and acetic acid 4: recrystallization. Proceed to the step #5 below.

Preparation and Recrystallisation of Aspirin

If the FeCl 3 remains yellow, even after.

Preparation and recrystallisation of aspirin
Rated 0/5 based on 99 review
Inorganic and Organic Chemistry - Preparation and Recrystallisation of Aspirin | Essay Example