Which of the following represents a conjugate acid-base pair? A) H₂PO₄^- and PO₄³^- B) HNO₃ and NO₃^- C) HCl and NaOH D) HSO₄^- and SO₃²^- E) none of these

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Quizplus · Accepted Answer

In a conjugate acid-base pair, one molecule acts as an acid and donates a proton while the other acts as a base and accepts that proton. In choice B, HNO3 (nitric acid) can donate a proton to form NO3- (nitrate), which acts as a base in this reaction. Therefore, HNO3 and NO3- form a conjugate acid-base pair. The other choices do not have a molecule that can donate or accept a proton to form a conjugate acid-base pair.

Which of the Following Represents a Conjugate Acid-Base Pair