Meq of oxalic acid =Meq of KMnO4
V*0.1=250*8/100*3L6*1000=6.3 litres.How mass is equivalent equal is it a formula??

Dear student,

Equivalent mass is the mass of one equivalent of any substance.
Mathematically, it is calculated as follows.

E q u i v a l e n t space m a s s space equals space fraction numerator M o l e c u l a r space m a s s over denominator N u m b e r space o f space e l e c t r o n s space g a i n e d space o r space l o s t space left parenthesis n right parenthesis end fraction N o r m a l i t y space left parenthesis N right parenthesis space equals space fraction numerator G r a m space e q u i v a l e n t space w e i g h t space o f space s o l u t e over denominator V o l u m e space o f space s o l u t i o n space left parenthesis l i t e r right parenthesis end fraction space equals space fraction numerator W e i g h t over denominator E q u i v a l e n t space w e i g h t end fraction N subscript 1 V subscript 1 space equals space N subscript 2 V subscript 2 0.1 space cross times V space equals space fraction numerator 250 space cross times 8 over denominator 100 space cross times space 31.6 end fraction space cross times space 1000 space V space equals space 6.3 space l i t e r

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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