Definition for Base hydrolysis constant

From Biology Forums Dictionary

(Kb) base ionization constant; basic hydrolysis constant. Compare with acid dissociation constant.

The equilibrium constant for the hydrolysis reaction associated with a base. For example, Kb for ammonia is the equilibrium constant for NH3(aq) + H2O() NH4+(aq) + OH-(aq), or Kb = [NH4+][OH-]/[NH3].