How many coulombs of electricity would be required to reduce the iron in 36.0 g of potassium hexacyano ferrate (III), `K_(3)Fe(CN)_(6)`, to metallic iron ?

Answer

`3.17 xx 10^(4)` coulomb

Explanation

Iron in the complex is `Fe^(3+)`.
`underset("1 mole")(K_(3)Fe(CN)_(6))+ underset(3 xx 96500 C)(3e^(-)) rarr 3K^(+)+6CN^(-) +Fe`