Water gas to hydrogen – industrially. - Vidyadip

Question

Water gas to hydrogen $–$ industrially.

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Answer

$\underset{\text { Iron(III) Oxide }}{ Fe_2O_3}+3 H_2 \longrightarrow \underset{\text { [iron metal] }}{2 Fe }+3 H _2 O$
$CO_2$ is removed by dissolving the mixture obtained in water under pressure
OR
By passing the mixture through water or $KOH$ [Caustic Potash Solution]
$\ce{2KOH + CO_2 \rightarrow K_2CO_3 + H_2 O}$
Residual gas left is $\text{HYDROGEN.}$

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