What is the volume (in ml) of 0.1 M potassium permanganate solution required to completely oxidise 100 ml of 0.5 M ferrous sulphate solution in acidic medium?
Given parameters are:
M1=0.1M
M2=0.5M
V1=?
V2=100ml
Balanced equation is:
10FeSO4+2KMnO4+8H2SO4=5Fe2SO4+2MnSO4+K2SO4+8H2O
Thus no. of moles of KMnO4 , n1 is 2
and of FeSO4 , n2 is 10.
Thus formula based on the concept of stoichiometry.
n2×M1×V1=n1×M2×V2
10×0.1×V1=2×0.5×100
V1=100ml
Therefore volume will be 100 ml.
Thus, Option D is correct.