Self-ionization
Liquid NH3 undergoes self-ionization (eq. 9.12), and the small value of Kself (Table 9.4) indicates that the equilibrium lies far over to the left-hand side. The [NH4] and [NH2] ions have ionic mobilities approximately equal to those of alkali metal and halide ions. This contrasts with the situation in water, in which [H3O]+ and [OH]- are much more mobile than other singly charged ions.