Which of the following species act as an amphiprotic species in the following reactions?
$H C l (a q) + H_{2} O (a q) ⇌ H_{3} O^{+} (a q) + C l^{-} (a q)$

$N H_{3} (a q) + H_{2} O (a q) ⇌ N H_{4}^{+} (a q) + O H^{-} (a q)$

N H_{3}

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H_{2} O

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O H^{-}

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C l^{-}

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Solution

The correct option is B $H_{2} O$
Amphiprotic Species:
Species which can accept $H^{+}$ as well as donate $H^{+}$ .
As per Bronsted-Lowry’s theory, species which can act as an acid as well as a base.

Water is amphiprotic in the following reactions,

$H C l (a q) + H_{2} O (a q) ⇌ H_{3} O^{+} (a q) + C l^{-} (a q)$ , here $H_{2} O (a q)$ is accepting $H^{+}$

$N H_{3} (a q) + H_{2} O (a q) ⇌ N H_{4}^{+} (a q) + O H^{-} (a q)$ , here $H_{2} O (a q)$ is giving $H^{+}$
Therefore water is amphiprotic.

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Similar questions

H C l (a q) + H_{2} O (a q) ⇌ H_{3} O^{+} (a q) + C l^{-} (a q)

N H_{3} (a q) + H_{2} O (a q) ⇌ N H_{4}^{+} (a q) + O H^{-} (a q)

M g (O H)_{2 (a q)} + 2 N a_{(s)} \to M g_{(s)} + 2 N a O H_{(a q)}

M n O_{4}^{-} (a q) + H_{2} O (a q) \to

{NH}_{3} (aq) + H_{2} O (l) \to {NH}_{4}_{4}^{+} (aq) + {OH}^{-} (aq)

H N O_{3} (a q) + O H^{-} (a q) ⟶ H_{2} O (l)

N O_{3}^{-} (a q)

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