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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??

**Dear student,**

Equivalent mass is the mass of one equivalent of any substance.

Mathematically, it is calculated as follows.

$Equivalentmass=\frac{Molecularmass}{Numberofelectronsgainedorlost\left(n\right)}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}Normality\left(N\right)=\frac{Gramequivalentweightofsolute}{Volumeofsolution\left(liter\right)}=\frac{Weight}{Equivalentweight}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}{N}_{1}{V}_{1}={N}_{2}{V}_{2}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}0.1\times V=\frac{250\times 8}{100\times 31.6}\times 1000\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}V=6.3liter$

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).

**Regards**

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