EMn3+/Mn2+ is positive.Give reason
Solution:
Mn3+ has 4 electrons in it's valence shell and the outer electronic configuration of 3d4 and Mn2+ has 5e in its outer electronic configuration (3d5).
Thus conversion of Mn3+ to Mn2+ will be a favoured by gain in stability due to half filled d-subshell (d5) configuration.
Hence, E° value for Mn3+/Mn2+ is positive.
Mn3+ has 4 electrons in it's valence shell and the outer electronic configuration of 3d4 and Mn2+ has 5e in its outer electronic configuration (3d5).
Thus conversion of Mn3+ to Mn2+ will be a favoured by gain in stability due to half filled d-subshell (d5) configuration.
Hence, E° value for Mn3+/Mn2+ is positive.