KMnO4 reacts with oxalic acid according to the equation2MnO4- +5C2O4^2- +16OH- -2MnO2+ + 10CO2 + 8H20here 20 mL of 0.1 M KMnO4 is equivalent to.....
1. 50mL of 0.5 M C2H2O4
2. 20 mL of 0.1 M C2H2O4
3. 20 mL of 0.5 M C2H2O4
4. 50 mL of O.1 M C2H2O4
Now,
Normality = molarity x change in oxidation number
So,
And
Also
Number of milli equivalents (meq)= Normality x volume in ml
Therefore,
And
Hence, 20 mL of 0.1 M KMnO4 is equivalent to 50 mL of 0.1 M C2H2O4