Question

Number of moles of MnO₄^- required to oxidies one mole of ferrous oxalate completely in acidic medium will be

0.6 mole

0.4 mole

7.5 mole

0.2 mole

Solution

0.6 mole

MnO subscript 4 superscript minus space plus space 5 straight C subscript 2 straight O subscript 4 superscript 2 minus end superscript space plus space 24 space straight H to the power of plus space rightwards arrow space 3 space Mn to the power of 2 plus end exponent space plus space 10 CO subscript 2 space plus 12 space straight H subscript 2 straight O because space Number space of space moles space of space MnO subscript 4 superscript minus space required space to space space oxidise space 5 space moles space of space straight C subscript 2 straight O subscript 4 superscript 2 minus end superscript space equals 3 therefore space Number space of space moles space of space MnO subscript 4 superscript minus space required space space to space oxidise space 1 space mole space of space straight C subscript 2 straight O subscript 4 superscript 2 minus end superscript space equals space equals 3 over 5 space equals space 0.6 space mol

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