Question

How many moles of 224 co  (oxalate ions) can be completely oxidized by one mole of 4 mno  ions in acidic medium?

Answer 1

The balanced redox reaction can be written as:

2 MnO4- + 5 C2O42- + 16 H+  → 2 Mn2+ + 10 CO2 + 8 H2O.

The equation shows that 2 moles of manganate ions oxidixe 5 moles of oxalate ions.

So, 1 mole of manganate ions will oxidize (5/2) = 2.2 moles of oxalate ions.