10.將下列兩個半電池相連時，其正確之自發性反應平衡式為下列何者？
     Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) 
(A) Ni2+(aq) + Al(s) → Al3+(aq) + Ni(s)
(B) 3Ni2+(aq) + 2Al(s) → 2Al3+(aq) + 3Ni(s)
(C) Ni(s) + Al3+(aq) → Ni2+(aq) + Al(s)
(D) 3Ni(s) + 2Al3+(aq) → 3Ni2+(aq) + 2Al(s)