Question

The following equilibrium is established when HClO4 is dissolved in weak acid HF.

HF + HClO4$\rightleftharpoons$ClO4– + H2F+

Which of the following is correct set of conjugate acid base pair ?

• A. HF and HClO4
• B. HF and ClO4–
• C. HF and H2F+
• D. HClO4& H2F+

Answer 1

Answer: (C)

HF and H2F+

Answer 2

Conjugate acid base pair are differ by an proton (H+).

HF+ $\xrightarrow { - \mathrm { H } ^ { + } }$ HF

(acid) (base)