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Coordination Compounds
Question
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On the basis of the following Eo values; the strongest oxidising agent is

[Fe(CN)6]4- → [Fe(CN)6]3-] +e- ;
Eo = -0.35 V

Fe2+ → Fe3+  +e-; E = -0.77 V

  • [Fe(CN)6]4-

  • Fe2+

  • Fe3+

  • [Fe(CN)6]3-

Answer

C.

Fe3+

Oxidised form + ne- → Reduced Form
The substance which has lower reduction potential are stronger reducing agent while the substances which have higher reduction potential are a stronger oxidising agent.
[Fe(CN)6]3- + e- →[Fe(CN)6]4- ; Eo = 0.35 V
Fe3+ + e- → Fe2+ ;                      Eo = 0.77 V
The reduction potential of Fe3+/ Fe2+ is higher, hence, Fe3+ is a strongest oxidising agent.

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