Question

$Mn{O}_4^{-}$ is an oxidant for $Fe{C}_2{O}_4$ and other complexes. Mention the moles of $Mn{O}_4^{-}$ required to oxidise 1 mol of ferrous chloride.

• A. $0.3mol$
• B. $0.6mol$
• C. $0.4mol$
• D. $0.2mol$

Answer 1

The correct option is D $0.2mol$

We have,

$Mn{O}_4^{-}+FeC{l}_2\to M{n}^{2+}+F{e}^{3+}$

so, gram equivalent of oxidising agent = gram equivalent of reducing agent

n-factor$\times$ moles of $Mn{O}_4^{-}$ = n-factor $\times$ moles of $FeC{l}_2$

$5\times x=1\times 1$

so, x= 0.2 mol

so, moles of $Mn{O}_4^{-}$ required = 0.2 moles.