The following equilibrium is established when ${HClO}_{4}$ is dissolved in weak acid HF.
$HF + {HClO}_{4} ⇌ {ClO}_{4_{}}^{-} + H_{2} F^{+}$
Which of the following is correct set of conjugate acid base pair ?

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HF and ${ClO}_{4}^{-}$

HF and ${HClO}_{4}$

${HClO}_{4} and H_{2} F^{+}$

HF and $H_{2} F^{+}$

answer is C.

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Detailed Solution

Conjugate acid base pair differ by a proton $(H^{+}) .$

In the given equilibrium reaction, The conjugate acid-base pairs are,

$\underset{(acid)}{H_{2} F^{+}} \overset{- H^{+}}{\to} \underset{(base)}{HF}$

$\underset{acid}{{HClO}_{4}} \overset{- H^{+}}{\to} C \underset{base}{{lO}_{4}^{-}}$

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