Reactions occurring at the electrodes in a redox cell

Note both oxidised and reduced forms must be present in the same solution, and so are written as separated only by a comma and not by a line. 

The species in solution involved in the electrode reactions are Fe (aq) and Fe (aq). The electrode is reversible with respect to both Fe (aq) and Fe (aq). 

This electrode consists of Pt(s) dipping into an aqueous solution containing Fe(CN)g (aq) and 

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