HNO₃ is a strong acid, whereas HNO₂ is a weak acid. Likewise, H₂SO₄ is a strong acid, whereas H₂SO₃ is a weak acid. Likewise, HClO₃ is a strong acid, whereas HClO₂ and HClO are weak acids.

(a) After water, what would be the predominant species present in a solution of HNO₃?

(b) After water, what would be the predominate species present in a solution of HNO₂?

(c) For acids of the general formula HXO_n where X is a nonmetal atom (these are called oxy-acids), how does the acid strength depend on the value of n?