Answer:
H₂O is the Bronsted Acid in this reaction.
Step-by-step explanation:
A Brønsted-Lowry acid is any species capable of donating a proton (H+).
A Brönsted-Lowry base is a substance capable of gaining or accepting a proton (H+).
In this way, the acid-base reaction is one in which a transfer of protons from the acid to a base occurs.
This theory, unlike Arrhenius theory does not require the presence of water as a solvent, but includes any type of solvent.
The conjugate acid of the base, is the one that is formed when the base receives an H +
The conjugate base of the acid is the base formed when the acid yields an H +.
In this case, you have:
NO₂⁻ + H₂O → HNO₂ + OH⁻
Water acts as an acid yielding a proton to NO₂⁻, which in turn acts as a base and forms the HNO₃ conjugate base.