Write chemical reactions to show the amphoteric nature of water.

Question

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Answer 1

Amphoteric nature of water is represented by following chemical reactions.
(1) Water as a base:
$H_{2} O (l) + H_{2} S (g) ⇌ H_{3} O^{+} (a q) + H S^{-} (a q)$
(2) Water as an acid:
$H_{2} O (l) + N H_{3} (a q) ⇌ O H^{-} + N H_{4}^{+}$
(3) Self ionization of water in which water simultaneous acts as acid and base.
$2 H_{2} O \to H_{3} O^{+} + O H^{-}$

Answer 2

Amphoteric nature of water is represented by following chemical reactions.
(1) Water as a base:

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

(2) Water as an acid:

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

(3) Self ionization of water in which water simultaneous acts as acid and base.

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