Some Basic Concepts Of Chemistry Question 74
Question: Number of moles of $ KMnO _4 $ required to oxidize one mole of $ Fe(C _2O _4) $ in acidic medium is
Options:
A) 0.167
B) 0.6
C) 0.2
D) 0.4
Show Answer
Answer:
Correct Answer: B
Solution:
[b] The required equation is $ 2KMnO _4+3H _2SO _4\xrightarrow{{}} $ $ K _2SO _4+2MnSO _4+3H _2O+~\underset{nascentoxygen}{\mathop{5[ O ]}}, $
$ 2Fe( C _2O _4 )+3H _2SO _4+3[ O ]\xrightarrow{{}} $ $ Fe _2{{( SO _4 )}_3}+2CO _2+3H _2O $
$ O $ required for 1 mol. of $ Fe(C _2O _4) $ is 1.5,5 $ O $ are obtained from 2 moles of $ KMnO _4 $
$ \therefore 1.5[ O ] $ will be obtained from $ =\frac{2}{5}\times 1.5=0.6 $ moles of $ KMnO _4 $ .
