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铁的化合价有+2和+3价,属于典型的变价金属,在与氧化性不同的氧化剂反应时,单质铁被氧化的价态不同.如:Fe+2HCl=FeCl2+H2↑;2Fe+3Cl2=2FeCl3.因此,等量的铁在此
The valence of iron is +2 and +3, which is a typical metavalent metal. When reacting with an oxidizing agent with a different oxidizing property, the valence states of elemental iron are different. For example: Fe+2HCl=FeCl2+H2↑; 2Fe+3Cl2 =2FeCl3. Therefore, the same amount of iron is here