A.H⁺    Fe²⁺  Na⁺                       B.Ag⁺    Cl^-  K⁺

C.K⁺  Ba²⁺  OH^-                        D.Cu²⁺    Br^-  OH^-

A.H₃O⁺、、Fe²⁺、Na⁺                             B.Ag⁺、、Cl^-、K⁺

C.K⁺、Ba²⁺、OH^-、                                 D.Cu²⁺、、Br^-、OH^-

A.H₃O⁺、NO、Fe²⁺、Na⁺                                                           

B.Ag⁺、NO、Cl^－、K⁺

C.K⁺、Ba²⁺、OH^－、SO                               

D.Cu²⁺、NH、Br^－、OH^－