Which among the following represent the conjugate acid/base pairs?

H_{3} O^{+} / H_{2} O

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H_{2} S O_{4} / S O_{4}^{2 -}

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H C O_{3}^{-} / C O_{3}^{2 -}

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All are conjugate acid/ base pairs

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Solution

The correct options are
A $H_{3} O^{+} / H_{2} O$
C $H C O_{3}^{-} / C O_{3}^{2 -}$
The conjugate acid-base pairs differ by one proton. Acid loses a proton to form its conjugate base.
A. $H_{3} O^{+} / H_{2} O$ represents a conjugate acid-base pair.
$H_{3} O^{+} a c i d ⇌ H^{+} + H_{2} O c o n j u g a t e b a s e$ .
B. $H_{2} S O_{4} / S O_{4}^{2 -}$ does not represent a conjugate acid-base pair as $H_{2} S O_{4}$ and $S O_{4}^{2 -}$ differ by two protons.
$H_{2} S O_{4} ⇌ 2 H^{+} + S O_{4}^{2 -}$
C. $H C O_{3}^{-} / C O_{3}^{2 -}$ represents a conjugate acid-base pair.
$H C O_{3}^{-} a c i d ⇌ H^{+} + C O_{3}^{2 -} c o n j u g a t e b a s e$

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Similar questions

H C O_{3}^{-}

H C O_{3}^{-} + H_{2} O ⇌ H_{3} O^{+} + C O_{3}^{2 -}

H C O_{3}^{-} + H_{2} O \to C O_{3}^{2 -} + H_{3} O^{+}

H C O_{3}^{-}

H C O_{3}^{-} + H_{2} O \to C O_{3}^{2 -} + H_{3} O^{+}

H C O_{3}^{-}

H C l + H_{2} O \to H_{3} O^{+} + C l^{-}

H C l

C l^{-}

H_{3} O^{+}

H_{2} O

H_{2} O

H_{3} O^{+}

H C l

H_{3} O^{+}

H C O_{3}^{-}

H C O_{3}^{-} + H_{2} O \to C O_{3}^{2 -} + H_{3} O^{+}

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