1. The problem statement, all variables and given/known data I'm trying to determine whether the arrowed nitrogen is acidic or basic. Apparently the answer is that it is acidic. I don't really understand how I am suppose to make that call. That nitrogen is part of secondary amine that is basic, with resonance effect from the oxygen that will make it more acidic. However, how do I know that the oxygen has enough effect to make it acidic and not just a very weak base? Edit: Ahh... read the answer wrong. It didn't say it was acidic, just that it was indeed a weaker base. Problem solved.