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Grade: upto college level
        The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is

a. 2/5
b. 3/5
c. 4/5
d. 1
5 years ago

Answers : (2)

Navjyot Kalra
askIITians Faculty
654 Points
							Sol. The balanced chemical reaction is :
  2MnO_4^- + 5CO_4^(2-) + 16H+ → 2Mn2+ + 5SO_4^(2-) + 3H2O
∵ 5 moles SO_4^(2-) reacts with 2 moles of KMnO4
∴ 1 mole SO_4^(2-) reacts with 2/4 mole of KMnO4. 

						
5 years ago
Roma
16 Points
							
The reaction will be
2KMnO4 + 5 H2SO3 --> K2SO4 +2 MnSO4 +2 H2SO4 + 3H2O
As 5 mole of sulphite reacts with 2 mole of  KMnO4 
Then 1 mole will react with 2/5 mole of KMnO4
2 years ago
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