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Conjugate Acids and Bases

An aqueous so...

Question

An aqueous solution of carbonic acid ( $H_{2} C O_{3}$ ) contains

( $H_{2} C O_{3}) o n l y$

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$H_{2} C O_{3}, H^{+}, H C O_{3}^{-}$

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$H_{2} C O_{3}, H^{+}, H C O_{3}^{-}, C O_{3}^{2 -}$

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$H_{2} C O_{3}, C O_{2}, H^{+}, H C O_{3}^{-}, C O_{3}^{2 -}$

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Solution

The correct option is D
$H_{2} C O_{3}, C O_{2}, H^{+}, H C O_{3}^{-}, C O_{3}^{2 -}$

The ionization happens through multiple steps. It never happens in a single step (for acids with more than one acidic Hydrogen atoms in a molecule)

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

Hence, d

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Similar questions

An aqueous solution of carbonic acid ( $H_{2} C O_{3}$ ) contains

(H_{2} C O_{3})

K_{1} = 4.2 \times 10^{- 7}

K_{2} = 4.8 \times 10^{- 11}

M

H_{2} C O_{3}

X

H_{2} C O_{3}

X_{1}

X_{2}

(H_{2} C O_{3})

K_{a_{1}} = 4.0 \times 10^{- 7}

K_{a_{2}} = 7.0 \times 10^{- 11}

[H C O_{3}^{-}]

0.025 M

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