First slide

Equivalent weights

Question

‘V’ litres of 0.2 M KMnO₄ can completely oxidise 5 litres of 0.4 M oxalic acid in acidic medium. The value of ‘V’ is

Moderate

A

4
B

8
C

1.6
D

2.4

Solution

V₁N₁(KMnO₄)=V₂N₂(H₂C₂O₄) ;
V₁(n₁)M₁(KMnO₄)=V₂(n₂)M₂(H₂C₂O₄) ;
V(5)0.2 (KMnO₄)=5(2)0.4(H₂C₂O₄) ;
V= 4 litres ;

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