What is the theoretical yield of methyl salicylate?
25 g
Collect the methyl salicylate (a colourless oil of delightful fragrance, ‘oil of wintergreen’) at 221— 224 °C; the yield is 25 g (81%).
What is the percentage yield of aspirin in industry?
The percent yield of the aspirin obtained from the experiment is 46.3% yield. The higher the yield percentage, the higher the purity of the aspirin will be. Therefore, according to the results, the aspirin obtained is relatively impure.
What is the theoretical yield of methyl salicylate in procedure 3?
1.27 g.
The yield of methyl salicylate, C8 H8 O3 , is 1.27 g.
How is methyl salicylate synthesis?
When salicylic acid is heated with methyl alcohol, the carboxyl group of salicylic acid is esterified producing a strong-smelling liquid ester (methyl salicylate). an alcohol and a carboxylic acid. The reaction is reversible and uses an acid as a catalyst.
What is the formula of methyl salicylate?
C8H8O3
Methyl salicylate/Formula
A benzoate ester that is the methyl ester of salicylic acid. Methyl salicylate (oil of wintergreen or wintergreen oil) is an organic compound with the formula C6H4(OH)(CO2CH3).
What is the synthesis of aspirin?
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.
How can the percent yield in synthesis of aspirin be increased?
In a reflux reaction with aspirin, the best yield should be obtained by heating the mixture of reactants around above the solvents boiling point. This will allow for optimal heat and higher rate of collisions during reaction, allowing more product to be produced.
What is the theoretical yield of aspirin?
2.520 grams
Thus, the calculated value of crude synthesized aspirin was 3.029 grams. Following purification, the calculated mass of the final aspirin product was 2.169 grams. The calculated theoretical yield was 2.520 grams.
What happens to methanol in synthesis of aspirin?
Methanol is the alcohol which is released by hydrolysis. Second, the hydroxyl group on salicylic acid will be used in ester formation to produce aspirin. As a result, the thermodynamic equilibrium will now be for the formation of an ester instead of its hydrolysis.
How is salicylic acid used in the synthesis of aspirin?
You will synthesis aspirin with salicylic acid being your limiting reagent. That means the amount of salicylic acid you use will determine how much aspirin you will make. This synthesis will then be used to analyze the purity and percent yield in part C.
How to calculate percent yield of aspirin synthesis?
This lab will require you to calculate the percent yield of the aspirin synthesis. Percent yield is calculated by dividing your actual yield (mass of aspirin you made) with the expected or theoretical yield (mass you calculated) multiplied by 100. A percent yield that is less than 100 means that you made less than what you were supposed to get.
How is methyl salicylate converted to methanol in Day 1?
Day 1: Hydrolysis of Methyl Salicylate. The reaction mixture is subsequently acidifed using sulfuric acid, which converts this anion into the fully protonated acid, salicylic acid. The alcohol is methanol. The salicylic acid, which is mostly insoluble, is a solid and can be isolated and purified by crystallization.
What is the molar mass of salicylic acid?
not present Starting Material/ Product: Methyl Salicylate Salicylic Acid Molar Mass (g/mole) 152.15 138.12 Mass of methyl salicylate (g) 2 Amount of methyl salicylate (moles) 3 Theoretical yield of salicylic acid (g)