The permanganate ion in acid medium acts as an oxidant and gets converted to its lower oxidation state. What would be the spin only magnetic moment of such reduced manganese ion?

Step-by-step solution

In an acidic medium, the permanganate ion ( MnO₄⁻ ) acts as an oxidizing agent and is reduced to the manganese(II) ion ( Mn²⁺ ). The oxidation state of manganese in MnO₄⁻ is +7 . In the acidic medium, the half-reaction is MnO₄⁻ + 8H⁺ + 5e⁻ Mn²⁺ + 4H₂O . The electronic configuration of the manganese atom ( Z=25 ) is [Ar] 3d⁵ 4s² . The electronic configuration of the Mn²⁺ ion is [Ar] 3d⁵ . In the 3d⁵ configuration, there are 5 unpaired electrons ( n=5 ). The spin-only magnetic moment ( ) is calculated using the formu