Select the conjugated pairs

Question

Select the conjugated pairs NH4+ + OH- ————>NH3 + O2H

Can we say NH3 is a base and NH4 is conjugate acid?

Answer 1

An acid is a proton (H⁺) donor, so it will give up a hydrogen and whatever it gives it up to is it’s conjugate base.

A base is a proton (H⁺) acceptor, so it is able to accept a hydrogen and whatever accepts the hydrogen is its conjugate acid

First determine which is the acid and which is the base.

NH4+ will give up a hydrogen and become NH3, so NH4+ is an acid and NH3 is it’s conjugate base.

OH- will accept a hydrogen and become H2O, so OH- is the base and H2O is it’s conjugate acid.