Solveeit Logo
Login

Question

Chemistry Question on d -and f -Block Elements

Equivalent mass of potassium permanganate in acid medium is

A

1/2 molecular mass

B

1/3 molecular mass

C

1/5 molecular mass

D

1/6 molecular mass.

Answer

1/5 molecular mass

Explanation

Solution

In acidic medium,
M+7nO4−+8H++5e−−>Mn2++4H2O{M^{+7} nO^-_4 + 8H^+ + 5e^- -> Mn^{2+} + 4H_2O}
Total number of electrons gained = 5
Total change in the oxidation number of Mn = 7 - 2 = 5
Emass of KMnO4=Mol.mass of KMnO45{E mass\, of \,KMnO_4 = \frac{ Mol.mass \, of\, KMnO_4}{5} }