What is the equilibrium constant expression (Ka) for the acid dissociation of nitrous acid HNO2? The equation of interest is
Answer
Ka = ([H3O+][NO2-])/([HNO2][H2O])
Ka = ([H3O+][NO2-])/([HNO2])
Ka = ([HNO2][H2O])/([H3O+][NO2-])
Ka = ([HNO2])/([H3O+][NO2-])