Ammonia is a weak base.
Write out the equilibrium reaction and the Kb expression for a solution of ammonia
Determine the Kb for a solution of ammonia
The equilibrium reaction for the dissociation of ammonia in water is:
NH3 + H2O ⇌ NH4+ + OH-
The Kb expression for ammonia can be written as:
Kb = [NH4+][OH-] / [NH3]
To determine the Kb for a solution of ammonia, we need to know the concentration of NH4+ and OH- ions formed from the dissociation of ammonia, as well as the concentration of ammonia itself. This information would need to be provided in the question or through experimental data.