Question

determine the molarity of the given kmno4 solution with the help of supplied M/20 mohr salt solution by titration method​

Answer 1

M(KMnO4) = V(Mohr's salt) / [100 * V(KMnO4)]

Explanation:

To find: The molarity of the given KMnO4 solution.

Given: m/20 Mohr's salt solution.

Titration reaction:  

2KMnO4 + 10FeSO4(NH4)2SO4.6H2O + 8H2O ---> K2SO4 + 2MnSO4 + 5Fe2(SO4)3 + 10(NH4)2SO4 + 68H2O

Solution:

We know that M(KMnO4) * V(KMnO4) / M(Mohr's salt) * V(Mohr's salt) = 2/10

 Where M is the molarity and V is the volume.

M(KMnO4) * V(KMnO4) / (1/20) * V(Mohr's salt) = 2/10

M(KMnO4) * V(KMnO4) / V(Mohr's salt) = 2/(20*10)

 M(KMnO4) * V(KMnO4) / V(Mohr's salt) = 1/100

M(KMnO4) = V(Mohr's salt) / [100 * V(KMnO4)]