Question

For the reaction $Fe_2O_3 +3CO \rightarrow 2Fe + 3CO_2$ the volume of carbon monoxide required to reduce one mole of ferric oxide is

• A. $22.4\, dm^3$
• B. $44.8\, dm^3$
• C. $67.2\, dm^3$
• D. $11.2 \, dm^3$

Answer 1

Answer: (C)

$67.2\, dm^3$

Answer 2

The correct option is(C): 67.2 dm 3.

$\underset{1\,mol} {Fe _{2}O_{3}}+\underset{3 mol }{3 CO } \longrightarrow 2 Fe +3 CO _{2}$

Volume of $1\, mole$ carbon monoxide

$= 22.4\, L$ (at STP)

$1$ mole of ferric oxide is reduced by $= 3$ moles of $CO$
$=3 \times 22.4\, L$ of $CO$
$=67.2 \,dm ^{3}$ of $CO$