Answer:
H₃O⁺ and Cl⁻
Step-by-step explanation:
Hydrochloric acid, a strong acid will ionize completely in solutions.
When acids ionize in water, they produce excess hydroxonium ions in such solution.
HCl + H₂O → H₃O⁺ + Cl⁻
The HCl and H₃O⁺ forms a conjugate pair and likewise the H₂O and Cl⁻
In this ionization, water acts as the base.