Share
Notifications

View all notifications

Account for the following : The E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+ couple. - Chemistry

Login
Create free account


      Forgot password?
ConceptGeneral Properties of the Transition Elements (D-block)

Question

Account for the following : The E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+ couple.

Solution 1

In case of Mn '+2' oxidation state is more stable than '+3' oxidation state and in case of Cr '+3' oxidation state is more stable than '+2' oxidation state.

Solution 2

The E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+ couple. This is because Mn2+ ion is particularly stable due to extra stability of its half filled valence electronic configuration (d5). Thus Mn3+ ion has a very high tendency to gain an electron and form the much more stable Mn2+ ion.

  Is there an error in this question or solution?

Video TutorialsVIEW ALL [1]

Solution Account for the following : The E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+ couple. Concept: General Properties of the Transition Elements (D-block).
S
View in app×