1. (a) Diesterification (Accept esterification or condensation).(b) Ethanoic anhydride (it works better than ethanoic acid as it is a stronger nucleophile).(c) Concentrated sulfuric acid.(d) More needs to be taken in order to achieve the original effects. The danger is that the lethal dose may be exceeded.(e) To prevent diseases (e.g. HIV/AIDS or hepatitis) being communicated between one user and another (this can occur...