Question

In acidic medium $KMnO_{4}$ oxidizes $FeSO_{4}$ solution which of the following statements is correct?

• A. 10 mL of 1 N $KMnO_{4}$ solution oxidizes 10 mL of 5 N $FeSO_{4}$ solution.
• B. 10 mL of 1 M $KMnO_{4}$ solution oxidizes 10 mL of 5 M $FeSO_{4}$ solution
• C. 10 mL of 1 M $KMnO_{4}$ solution oxidizes 10 mL of 1 M $FeSO_{4}$ solution
• D. 10 mL of 1 N $KMnO_{4}$ solution oxidizes 10 mL of $0.1$ M $FeSO_{4}$ solution.

Answer 1

Answer: (B)

10 mL of 1 M $KMnO_{4}$ solution oxidizes 10 mL of 5 M $FeSO_{4}$ solution

Answer 2

$2KMnO_{4} + 8H_{2}SO_{4} + 10FeSO_{4}\overset{\quad\quad}{\rightarrow}$

$K_{2}SO_{4} + 2MnSO_{4} + 5Fe_{2}(SO_{4})_{3} + 8H_{2}O$

One mole of $KMnO_{4}$ oxidizes five moles of $FeSO_{4}$ i.e. 1 M $KMnO_{4}$ can oxidize equal amount of 5 M $FeSO_{4}$