Is my reasoning correct?
Given the following equilibria:
NH4 + H2O <----> NH3 + H3O Ka = 5.6 x 10-10
HNO2 + H2O <----> NO2- + H3O Ka = 4.5 x 10-4
The aq solution of NH4NO2 is acidic? basic? neutral?
My reasoning:
NH3+ + HNO2 ---> NH4NO2
I simply look up the Kb value for NH3 and the Ka for HNO2, which are Kb = 1.8 x 10-5, Ka= 4.5 x 10-4
Since Ka is larger, the soln is acidic
Or am I suppose to solve for Kb given the equilibria above?