NH3 and Methylamine

[Ian_Lee_1E]

Hello,

I was watching lecture 26 and saw that Methylamine, which derives from NH3, ammonia, is a weak acid.

I was wondering what property of NH3 makes it a weak base.

[Hasmik Dis 2F]

The lone pair is what makes NH3 a weak base. Oxygen, being more electronegative than the nitrogen, will be more attracted to the lone pair on the nitrogen than nitrogen itself. This causes ammonia to let go of these electrons more easily- thus making it a weaker base. I guess I am using the Lewis base definition to understand this concept.