Question

Ammonium ion is

• A. a conjugate acid
• B. a conjugate base
• C. neither an acid nor a base
• D. both an acid and a base

Answer 1

Answer: (B)

$\underset{\text{base}}{N{H}_3}+H^{+}\to \underset{\text{conjugate acid}}{N{H}_4^{+}}$
Hence, ammonium ion is a conjugate acid of ammonia.