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Some Basic Concepts of Chemistry
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13/08/2021 11:51 am
Topic starter
Number of moles of KMnO4 required to oxidize one mole of Fe(C2O4) in acidic medium is
(a) 0.167
(b) 0.6
(c) 0.2
(d) 0.4
1 Answer
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13/08/2021 11:59 am
Correct answer: (b) 0.6
Explanation:
The required equation is
2KMnO4 + 3H2SO4 → K2SO4 + 2MnSO4 + 3H2O + 5[O](nascent oxygen)
2Fe(C2O4) + 3H2SO4 + 3[O] → Fe2(SO4)3 + 2CO2 + 3H2O
O required for 1 mol. of Fe(C2O4) is 1.5, 5 O are obtained from 2 moles of KMnO4
∴ 1.5 [O] will be obtained from
= \(\frac{2}{5}\) x 1.5 = 0.6 moles of KMnO4