AP Chemistryeasymcq1 pt
Which pair is a conjugate acid–base pair?
A.NH₄⁺ and NH₃
B.HCl and NaOH
C.H₂SO₄ and SO₄²⁻
D.CH₃COOH and CH₃COO⁻ + H₂O
Explanation
Core Concept
They differ by exactly one H⁺: NH₄⁺ donates a proton to become NH₃. That single-proton difference defines a conjugate pair.
Correct Answer
ANH₄⁺ and NH₃
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