Question: (a) Cyanide ion causes E for Fe(III) to decrease: Which ion, Fe(III) or Fe(II), is stabilized more by complexing with CN-? (b) Using Appendix H,

(a) Cyanide ion causes E for Fe(III) to decrease:

Which ion, Fe(III) or Fe(II), is stabilized more by complexing with CN-?
(b) Using Appendix H, answer the same question when the ligand is phenanthroline instead of cyanide.

Fe3+ eFe2+ Ferric Ferrous Fe(CN)6 eFe(CNE 0.356 V Ferricyanide Ferrocyanide Phenanthroline

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