The amount of charge in F (Faraday) required to obtain one mole of iron from is . (Round off the answer to the nearest integer)

Question

The amount of charge in F (Faraday) required to obtain one mole of iron from  is . (Round off the answer to the nearest integer)

Canvas Classes · Accepted Answer

Strategy:
 Determine the average oxidation state of iron in  and calculate the moles of electrons required to reduce it to elemental iron (oxidation state 0).

Step 1: Calculate oxidation state
In  (Magnetite), the average oxidation state of Fe is:

Step 2: Calculate Faraday required per mole Fe
To reduce 1 atom of Fe from  to :
 electrons gained.
For 1 mole of Fe atoms, the charge required is .

Step 3: Rounding
. The nearest integer is 3.

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