Question

Which of the following species, do not show disproportionation reaction and why?
$\text{Cl}{\text{O}}^{-},{\text{ClO}}_2^{-},{\text{ClO}}_3^{-}\text{and}{\text{ClO}}_4^{-}$

Also, write the reaction for each of the species that disproportionate.

Answer 1

Solution:-

${Cl{O}_4}^{-}$ does not undergo disproportionation as in ${Cl{O}_4}^{-}$, the chlorine is already present in the highest oxidation state of $+7$ and hence cannot be further oxidized.

Disproportionation reactions of remaining $3$ species-

• $3{ClO}^{-}⟶2{Cl}^{-}+{Cl{O}_3}^{-}$
• $3{Cl{O}_2}^{-}⟶{Cl}^{-}+2{Cl{O}_3}^{-}$
• $4{Cl{O}_3}^{-}⟶{Cl}^{-}+3{Cl{O}_4}^{-}$