15.0 mL of 0.12 M `KMnO_(4)` solution are required to oxidise 20.0 mL of `FeSO_(4)` solution in aicdic medium what is the concentration of `FeSO_(4)` solution ?

Answer

0.45 M

Explanation

The balaced chemcial equation for the redox reaction is
`2KMnO_(4)+10FeSO_(4)+8H_(2)SO_(4)rarrK_(2)SO_(4)+2MnSO_(4)+5Fe_(2)(SO_(4)^(3)+8H_(2)O)`
Applying molarity eqautin to the above redox reaction
`=(15xx0.12)/(2)KmnO_(4)=(20xxM_(1))/(10)(FeSO_(4)) or M_(1)=(15xx0.12xx10)/(2xx20)=0.45`