Lewis acid is the electron pair acceptor Lewis base is the electron pair donar a) OH- + Al(OH)3 -----> Al(OH)4- Al(OH)3 is the lewis acid OH- is the lewis base b) SO3 + H2O --------> H2SO4 H2O is the lewis acid SO3 is the lewis base H2O is the lewis acid SO3 is the lewis base c) Co3+ + 6NH3 -----> Co(NH3)63+ Co 3+ is the lewis acid NH3 is the lewis base Co 3+ is the lewis acid NH3 is the lewis base Solution Lewis acid is the electron pair acceptor Lewis base is the electron pair donar a) OH- + Al(OH)3 -----> Al(OH)4- Al(OH)3 is the lewis acid OH- is the lewis base b) SO3 + H2O --------> H2SO4 H2O is the lewis acid SO3 is the lewis base H2O is the lewis acid SO3 is the lewis base c) Co3+ + 6NH3 -----> Co(NH3)63+ Co 3+ is the lewis acid NH3 is the lewis base Co 3+ is the lewis acid NH3 is the lewis base.