鐵與鋅的分辯?

Fe + H2SO4 --> FeSO4 + H2
FeSO4 is pale green in colour

Zn + H2SO4 --> ZnSO4 + H2
ZnSO4 is colorless in color

another method is reaction with oxygen
in heating Fe,black solid is formed
in heating Zn powder (yellow when hot,white when cold) is formed

also,I think rust indicator also can distinguish them
but better using displacement (置換反應)

2007-01-06 13:47:40 補充：
The first method is to adding acid

2007-01-06 13:48:10 補充：
apart from sulphuric acidhydrchloric acid can be used