Question

Bronsted lowry vs Lewis acid-base question

Answer 1

Please refer to the attached file. #15 is asking which equaton is a lewis acid-base reaction but not a bronsted lowry acid base reaction. The answer key says its C but that looks like a Bronsted Lowry reaction to me. I thought the answer is suppose to be A.

Can someone please take a look at it?
Thanks

Answer 2

A Bronsted-Lowry reaction by definition is one which exchanges protons (H+)
If this does not occur, but there is electron transfer, we call that a Lewis acid-base reaction.

For A notice the ammonia accepts a proton to become an ammonium (NH4+) ion.
In C, a hydroxide is added but there is no exchange of protons (H+)