Question

Why is superoxide ion more stable with larger cations only?

Answer 1

Answer:

Superoxide: Stability increases down the group. Superoxides of K, Rb and Cs are most stable. Larger cations are stabilized by larger anions due to higher lattice energies. ... K, Rb and Cs have weaker positive field around their cations and thus the oxide ion can take up two more oxygen atoms to form the superoxide ion.

Answer 2

Explanation:

Stability increases down the group. Superoxides of K, Rb and Cs are most stable. Larger cations are stabilized by larger anions due to higher lattice energies. K, Rb and Cs have weaker positive field around their cations and thus the oxide ion can take up two more oxygen atoms to form the superoxide ion.