Ni( NO3)2 + Ba ( OH)2 => Ni(OH)2 + Ba( NO3)2
Ni^{2+} +2NO3^{-} + Ba{2+} + 2OH^{-} = Ni(OH)2 + Ba{2+} + 2NO3^{-}
Ni^{2+} 2OH^{-} = Ni(OH)2
Ni( NO3)2 + Ba ( OH)2 => Ni(OH)2 + Ba( NO3)2
Ni^{2+} +2NO3^{-} + Ba{2+} + 2OH^{-} = Ni(OH)2 + Ba{2+} + 2NO3^{-}
Ni^{2+} 2OH^{-} = Ni(OH)2