I have a couple of questions I'm stuck on about aspirin. Any help appreciated.
During the making of aspirin, is an ester the functional group created?
Also, I've been told to work out a theoretical yield of aspirin, using 3g of hydroxybenzoic acid, and4ml of ethanouc anhydride, so need to work out the moles. What is the usual concentration of ethanouc anhydride used for this experiment?
Also, why is water added to the mixture after reflux, and what is the purpose of cooling using an ice bath? Does it help with crystallisation?
Thanks for any help