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9.24  Write chemical reactions to show the amphoteric nature of water.

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It has the ability to act as an acid as well as a base. In the Bronsted sense, it acts as an acid with ammonia and a base with hydrogen sulphide.

Reactions to show the amphoteric nature of water -

H_{2}O(l)+NH_{3}(aq)\rightleftharpoons OH^{-}(aq)+NH_{4+}(aq)

\\H_{2}O(l)+NH_{3}(aq)\rightleftharpoons OH^{-}(aq)+NH_{4}^{+}(aq)\\ H_{2}O(l)+H_{2}S(aq)\rightleftharpoons H_{3}O^{+}(aq)+HS^{-}(aq)

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Rakesh

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