Final answer:
The conjugate acid-base pairs for the reaction NH₃(aq) + H₂O(l) ⇌ NH₄⁺+(aq) + OH⁻(aq) are NH₃ and NH₄⁺+, and H₂O and OH⁻. NH₃ is the base that accepts a proton, forming its conjugate acid NH₄⁺+, while H₂O donates a proton, forming its conjugate base OH⁻.
Step-by-step explanation:
The conjugate acid-base pairs in the reaction NH₃(aq) + H₂O(l) ⇌ NH₄⁺+(aq) + OH⁻(aq) are identified by determining which substances donate and accept protons. The substance that donates a proton is the acid, and its conjugate base is what remains after the proton is removed. Conversely, the substance that accepts a proton is the base, and its conjugate acid is formed when the proton is added.
In this reaction:
NH₃ acts as a base by accepting a proton from H₂O, which acts as an acid. The reaction forms the conjugate acid NH₄⁺+ and the conjugate base OH⁻.