Question

Number of moles of KMnO₄ required to oxidize one mole of Fe(C₂O₄) acidic medium is ______.

Options

• 0.167

• 0.6

• 0.2

• 0.4

Answer 1

Number of moles of KMnO₄ required to oxidize one mole of Fe(C₂O₄) acidic medium is 0.6.

Explanation:

The required equation is

\[\ce{2KMnO4 + 3H2SO4 -> K2SO4 + 2MnSO4 + 3H2O + \underset{nascent oxygen}{5[O]}}\]

\[\ce{2Fe(C2O4) + 3H2SO4 + 3[O] -> Fe2(SO4)3 + 2CO2 + 3H2O}\]

O required for 1 mol. of Fe(C₂O₄) is 1.5, 5O are obtained from 2 moles of KMnO₄.

∴ 1.5 [O] will be obtained from = `2/5 xx 1.5` = 0.6 moles of KMnO₄.