Write chemical reactions to show the amphoteric nature of water.
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Amphoteric nature of water is represented by following chemical reactions. (1) Water as a base: H2O(l)+H2S(g)⇌H3O+(aq)+HS−(aq) (2) Water as an acid: H2O(l)+NH3(aq)⇌OH−+NH4+ (3) Self ionization of water in which water simultaneous acts as acid and base. 2H2O→H3O++OH−