Cobalt (II) is stable in aqueous solution but in the presence of complexing reagents ( strong field ligands ) it is readily oxidised. Why ?

How would you account for the following : Cobalt (II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised.

How would you account for the following: Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised.

Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents, it is easily oxidised. Explain.

Co(II) is stable in aqueous solution, but in presence of complexing reagent it is easily oxidised. Explain.

How would you Account for the following: (i) Of the d^4 species, Cr^(2+) is strongly reducing while manganese (III) is strongly oxidising, (ii) Cobalt (II) is stable in aqueous solution but in the presence of complexing reagents, it is easily oxidised. (iii) The d^1 configuration is very unstable in ions.

How would you account for the following: i. Of the dot d^(4) species, Cr ^2+ is strongly reducing while manganese(III) is strongly oxidising. ii. Cobalt(II) is stable in aqueous solution but. in the presence of complexing reagents it is easily oxidised. ii. The d^1 configuration is very unstable in ions?