Final answer:
The conjugate acid of the Brønsted-Lowry base C₅H₅NH₂ is C₅H₅NH₃+, which is formed when pyridine accepts a proton.
Step-by-step explanation:
The conjugate acid of the Brønsted-Lowry base C₅H₅NH₂ is C₅H₅NH₃+.
When the base C₅H₅NH₂ accepts a proton (H+), it becomes its conjugate acid, which is the pyridinium ion, C₅H₅NH₃+. According to the Brønsted-Lowry theory, acids are proton donors and bases are proton acceptors.
So when C₅H₅NH₂, known as pyridine, acts as a base by accepting a proton, the resultant species is its conjugate acid, C₅H₅NH₃+.