The formula for the conjugate acid of [tex](NO_2^-)[/tex] is [tex](HNO_2)[/tex].
A conjugate acid is a product that is different from a base by one proton. Examples of conjugate acids include water (base) reacting with an acid to form the hydronium ion (conjugate acid), and ammonia (base) reacting with an acid to form the ammonium ion (conjugate acid).
In acidic conditions, nitrite[tex](NO_2^-)[/tex] and nitrous acid [tex](HNO_2)[/tex] are present as a conjugate acid-base pair.
The formula for the conjugate acid of [tex](NO_2^-)[/tex] is [tex](HNO_2)[/tex]
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