rp10 questions to learn (2)

Question 1

Why is water added to the ester rather than adding the ester to the water?

Answer 1

As it reduces the amount of residue that is left over in the conical flask to make sure all reaction mixture is undergoing purification.

Question 2

Why is vacuum filtration used to filter the aspirin?

Answer 2

It is chosen over gravitational filtration as it allows for faster filtration, improved purity, better crystal formation, reduced solvent usage. It allows solid impurities to be removed from impurities in the liquid phase.

Question 3

Why do we wash the aspirin with water?

Answer 3

To ensure a high yield of aspirin as it makes sure all of the reaction mixture is filtered by the vacuum filter

Question 4

What is the name of the funnel used in vacuum filtration?

Answer 4

Buchner funnel

Question 5

The crude aspirin is dissolved in what chemical? What else dissolves with the aspirin?

Answer 5

Ethanol.