Equilibrium Constant

Ink = 160

The equilibrium constant for the given reaction is calculated by combining the given equilibria: Substituting the values:

The equilibrium constant is related to the electrode potentials: Substituting : Using :

In tetrahedral coordination complexes, the five d-orbitals split into two sets: a lower energy doubly degenerate set 'e' ( and ) and a higher energy triply degenerate set ' ' ( ).
The energy of an electron in the 'e' set is relative to the barycenter, while the energy in the ' ' set is .
The Crystal Field Stabilization Energy (CFSE) is calculated using the formula:
$ n_e n_{t2} t_2 d^2 e^2 t_2^0 d^4 e^2 t_2^2 d^6 e^3 t_2^3 d^8 e^4 t_2^4 $
This matches with II.

Comparing the results, the correct match is A-III, B-IV, C-I, D-II.