It's important to note that hydrogen peroxide solution is acidic. The following reaction will take place:
2 KMnO4 + 3 H2SO4 + 5H2O2 = 2 MnSO4 + K2SO4 + 5O2 + 8H2O
5 H2O2 + 2MnO4- + 6H+ = 5O2 + 2Mn2+ + 8H2O
If the volume of potassium permanganate solution was 0.1 L (or any other value), then number of moles must be:
As the ratio hydrogen peroxide vs permanganate ion is 5:2, then moles of H2O2:
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