What is the molarity of H3O+ in a 4.97×10-2 M NH4Cl solution that hydrolyzes according to the equation.

Question

NH4+(aq) + H2O(l) = H3O+(aq) + NH3(aq)

Answer 1

You have the equation. Set up an ICE chart and calculate H3O^+.
You will need Ka for NH4^+ and it can be calculated from Ka = Kw/Kb where Kw = 1 x 10^-14 and Kb = 1.8 x 10^-5.