Question

Co²⁺ is easily oxidized to Co³⁺ in the presence of a strong ligand (At. No. of Co = 27).

Hint:

Strong field ligands can stabilize high oxidation states, like Co\(^{3+}\), by creating a strong ligand field.

Answer 1

The compound \([\text{Co(NH}_3)_6][\text{Cr(CN)}_6]\) demonstrates ionization isomerism.

Ionization isomerism occurs when two distinct compounds share an identical molecular formula but differ in their ionic arrangements. One isomer will contain the \([\text{Cr(CN)}_6]^{3-}\) ion as the counter-anion, whereas the other will feature the \([\text{Co(NH}_3)_6]^{3+}\) ion as the counter-anion.

Variations in ionic arrangement result in the formation of different ions when dissolved, which is the basis of this isomerism.