Meq of oxalic acid =Meq of KMnO4
V*0.1=250*8/100*3L6*1000=6.3 litres How mass is equivalent is this a formula??
Equivalent mass is the mass of one equivalent of any substance.
Mathematically, it is calculated as follows.
This question if from the concept of titration and in titration molar equivalent mass is equal in the equivalence point.
Hence, the correct option is (a).