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Wxplain why E^(@) for Mn^(3+)//Mn^(2+) c...

Wxplain why `E^(@)` for `Mn^(3+)//Mn^(2+)` couple is more positive than that for `Fe^(3+)//Fe^(2+)`(At. Nos. Mn=25,Fe=26)?

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Explain why E^(@) for Mn^(3+)//Mn^(2+) couple is more positive than that for Fe^(3+)//Fe^(2+) (At. Nos. Mn=25,Fe=26)?

Explain why: (i) E^0 for Mn^(3+)//Mn^(2+) couple is more positive than that for Fe^(3+)//Fe^(2+) . (At. Nos. Mn = 25, Fe = 26). (ii) Ce^(3+) can be easily oxidised to Ce^(4+) . (At. No. Ce = 58).

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E^(@) for Mn^(3+), Mn^(2+) is more positive than that for Fe^(3+), Fe^(2+) , Why?

Give reason for the folloiwng : (a) E_("value")^(@) for Mn^(3+)//Mn^(2+) couple is much more positive than that of Fe^(3+)//Fe^(2+) couple. (b) Sc^(3+) is colourless in aqueous solution whereas Ti^(3+) is coloured.

Give reason for the folloiwng : (a) E_("value")^(@) for Mn^(3+)//Mn^(2+) couple is much more positive than that of Fe^(3+)//Fe^(2+) couple. (b) Iron has higher enthalpy of atomization then that of copper. (c) Sc^(3+) is colourless in aqueous solution whereas Ti^(3+) is coloured.