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Which Pair of Substances Does Not Represent a Conjugate Acid-Base

Question 21

Multiple Choice

Which pair of substances does not represent a conjugate acid-base pair?

A) CH₃COOH and CH₃COO^-
B) CH₃NH₃⁺ and CH₃NH₂
C) H₂SO₃ and HSO₄^-
D) HPO₄^2- and PO₄^3-
E) HCOOH and HCOO^-

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