Question

Question = Why are [tex]{Mn^2+}[tex] compounds are more stable than [tex] {Fe^2+}[tex] towards oxidation to their +3 state ?

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Answer 1

$\boxed{<u> </u><u>ANS</u><u>WER</u><u> </u>}$

Electronic Configuration of Mn$^{2 + }$is [Ar] 3d$^{5}$which is half filled and hence it is stable. Therefore, third ionisation enthalpy is very high i.e third electron cannot be easily removed. in case of Fe^2+ , the electronic configuration is

3d$^{6}</em><em>.</em><em> </em><em>Therefore</em><em> </em><em> </em><em>Fe</em><em>^{2+}$ can easily lose one electron to acquire 3d$^{5+}$stable electronic configuration.