Select the pair that consists of an acid and its conjugate base in that order. A)NH₃/NH₄⁺ B)SO₄^2-/HSO₃^- C)H₂SO₃/HSO₃^- D)H₂PO₄^-/H₃PO₄ E)CO₃^2-/HCO₃^2-

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In choice C, we have HS (hydrogen sulfide) as an acid and its conjugate base, S2- (sulfide) as the second compound. The other choices do not have a clear acid-conjugate base pair.

Select the Pair That Consists of an Acid and Its