Volume of M / 8 KMnO ₄ solution required to react completely with 25.0 ~cm ^3 of M / 4 FeSO ₄ in acidic medium is.

Step-by-step solution

The balance ionic equation for the reaction is MnO ₄⁻+5 Fe ²⁺+8 H ⁺ Mn ²⁺+5 Fe ³⁺+4 H ₂ O From the above equation it is clear that 1 mole of KMnO ₄=5 moles of FeSO ₄ . Apply molarity equation to balance the redox reaction aligned M₁ V₁ n₁ ( KMnO ₄ ) & = M₂ V₂ n₂ ( FeSO ₄ ) 1 V₁ 8 1 & = 1 4 25 5 V₁ & = 1 25 8 4 5 V₁ & =10 ~cm ^3 or V₁=10.0 ~mL aligned