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Question

What is the number of moles of $$KMnO_4$$ that will be needed to react completely with one mole of ferrous oxalate in an acidic medium?


Solution

The balanced chemical reaction can be given as :
$${ 3MnO }_{ 4 }^{ - }+5Fe{ C }_{ 2 }{ O }_{ 4 }^{ 2- }+2{ 4H }^{ + }\rightarrow { 3Mn }^{ +2 }+5{ Fe }^{ 3+ }+10{ CO }_{ 2 }+12{ H }_{ 2 }O$$
Therefore, as per stiochiometry,
3 moles of $${ KMnO }_{ 4 }$$ are needed to react completely with 5 moles of ferrous oxalate.
$$\therefore $$  For one mole of Ferrous oxalate $$=\dfrac { 3 }{ 5 } $$ moles of $${ KMnO }_{ 4 }$$ are required.
$$\therefore $$  For one mole of ferrous oxalate in acidic medium, $$\dfrac { 3 }{ 5 } $$ moles of $${ KMnO }_{ 4 }$$ are needed.

Chemistry

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