What is the pH of a 0.42 M NH4NO3 aqueous solution?

Question

What is the percent ionization?

Answer 1

Hydrolyze NH4^+.
NH4^+ + H2O ==> H3O^+ + NH3

Ka = (Kw/Kb) = (H3O^+)(NH3)/(NH4^+)
Set up an ICE chart and solve for (H3O^+), then convert to pH.