1. Interpret the infrared and NMR spectra of benzocaine.
2.What is the structure of the precipitate that forms after thesulfuric acid has been added?
3. When 10% sodium carbonate solution is added, a gas evolves.What is the gas? Give a balanced equation for this reaction.
4. Explain why benzocaine precipitates during theneutralization.
5. Refer to the structure of procaine in the table in the essay“Local Anesthetics.†Using p-aminobenzoic acid, give equationsshowing how procaine and procaine monohydrochloride could beprepared. Which of the two possible amino functional groups inprocaine will be protonated first? Defend your choice. (Hint:Consider resonance.)
