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Question:

Consult the table of standard electrode potentials and suggest three substances that can oxidise ferrous ions under suitable conditions.

Answer:

Substances that are stronger oxidising agents than ferrous ions can oxidise ferrous ions.

Fe2+ → Fe3+ + e-1  ;   Eø =  - 0.77 V

This implies that the substances having higher reduction potentials than +0.77 V can oxidise ferrous ions to ferric ions.

Three substances that can do so are F2, Cl2, and O2.


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