- #1
chatelier
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In terms of electronic structure, Fe3+ is more stable than Fe2+ because it has a half filled d-orbital which gives extra stability.
i.e. Fe3+ : [Ar]3d5
Fe2+ : [Ar]3d6
But the standard electrode potential of the following reaction is 0.77V,
Fe3+(aq) + e- => Fe2+(aq)
which means formation of Fe2+is favored and Fe2+ should be more stable in this case.
so, actually, Fe2+ or Fe3+ is more stable?
i.e. Fe3+ : [Ar]3d5
Fe2+ : [Ar]3d6
But the standard electrode potential of the following reaction is 0.77V,
Fe3+(aq) + e- => Fe2+(aq)
which means formation of Fe2+is favored and Fe2+ should be more stable in this case.
so, actually, Fe2+ or Fe3+ is more stable?