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QJEEM22Ch82c7: JEE Main 2022 Chemistry - Class 12 JEEM22Ch82c7 Solution: The amount of charge in (Faraday) required to obtain one mole…

The amount of charge in F\mathrm{F} (Faraday) required to obtain one mole of iron from Fe3O4\mathrm{Fe}_{3} \mathrm{O}_{4} is ___________. (Nearest Integer)

Step-by-Step Verified Solution

For Fe3O4\mathrm{Fe}_{3} \mathrm{O}_{4} ,

x=+83x=\frac{+8}{3}

where x is oxidation state of Fe.

Fe3O4+8H++8e−⟶3Fe+4H2O\mathrm{Fe}_{3} \mathrm{O}_{4}+8 \mathrm{H}^{+}+8 \mathrm{e}^{-} \longrightarrow 3 \mathrm{Fe}+4 \mathrm{H}_{2} \mathrm{O}

Charge required =83×F=8 F3≃3 F=\frac{8}{3} \times \mathrm{F}=\frac{8 \mathrm{~F}}{3} \simeq 3 \mathrm{~F}

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