Which of the following are Brønsted-Lowry conjugate acid-base pairs in an aqueous solution?
A. HClO₄/H₃O+ B. HClO₃/H₃O+ C. HClO₃/HClO₄ D. HClO₄/ClO₃–
E. HClO₄/ClO₄–
Solution:
A conjugate acid-base pair consists of two molecules that differ in ONE HYDROGEN ONLY. We can eliminate choices A, and B. C differs in one oxygen, and can be eliminated as well. D differs in one hydrogen and one oxygen and can be eliminated. Choice E is the correct answer choice.
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