Question

1 mole of equimolar mixture of ferric oxalate and ferrous oxalate will require x mole of $KMn{O}_4$ in acidic medium for complete oxidation, x is

• A. 0.6 mole
• B. 0.9 mole
• C. 0.3 mole
• D. 1.8 mole

Answer 1

The correct option is C

0.3 mole

$\begin{array}{cc}F{e}_2^{+3}\underset{\downarrow \left(1\right)}{(C_2^{+3}{O}_4{)}_3}& Vs\underset{\downarrow \left(5\right)}{Mn{O}^{-}}\\ F{e}^{+3}C{O}_2^{+4}& M{n}^{+2}\\ nfactor6& 5\\ moleratio5& =6\\ 0.5---?& =0.6\end{array}$

$\begin{array}{ccc}Fe& C_2{O}_{4}Vs& Mn{O}_4^{-}\\ \downarrow & \downarrow & \downarrow \\ F{e}^{+3}& C{O}_2^{+4}& M{n}^{+2}\\ nfactor& 3& 5\\ moleratio& 5& 3\\ & 0.5-----?=0.3& \end{array}$