Answer: The conjugate acid in the reaction described in HCl(g) + NH3(aq) → NH4+(aq) + Cl- (aq) is NH4+.
Explanation:
- First of all, we should define the meaning of conjugate acid and conjugate base.
- The conjugate acid: is the species produced when a base accepts a hydrogen ion.
- The conjugate base: is the species produced when an acid donates a hydrogen ion.
- In our example: the acid is HCl and the base is NH3.
- The acid (HCl) donates its hydrogen ion and produce Cl- which is considered as conjugate base.
- The base (NH3) accepts the hydrogen ion that donated from HCl and produce NH4+ which is considered as conjugate acid.