synthesis of aspirin

Question 1

stage 1

Answer 1

add NaOH to methyl-2-hydroxybenzoic acid
under reflux
allow to cool
add HCl to neutralise

Question 2

stage 2

Answer 2

react the 2 hydroxybenzoic acid with ethanoic anhydride
few drops conc acid
cool mixture in water bath until solid dissolves

Question 3

stage 3

Answer 3

add the min amount of hot ethanol to impure aspirin
sample will dissolve
cool to allow recrystalisation

Question 4

stage 4

Answer 4

filter under reduced pressure using Buchner apparatus
wash in cold water

Question 5

stage 5

Answer 5

place small sample in melting tube
use melting point apparatus- set to 130
insert sample
record range over which sample metls