Write chemical reactions to show the amphoteric nature of water.

(N/A) The amphoteric nature of water can be described on the basis of the following reactions:
$1)$ Reaction with $H_2S$ (Water acts as a base):
$H_2O_{(l)} + H_2S_{(aq)} \rightleftharpoons H_3O^{+}_{(aq)} + HS^{-}_{(aq)}$
$2)$ Reaction with $NH_3$ (Water acts as an acid):
$H_2O_{(l)} + NH_{3_{(aq)}} \rightleftharpoons OH^{-}_{(aq)} + NH^{+}_{4_{(aq)}}$
$3)$ Self-ionization of water:
In this reaction,one water molecule acts as an acid and another as a base:
$H_2O_{(l)} + H_2O_{(l)} \rightleftharpoons H_3O^{+}_{(aq)} + OH^{-}_{(aq)}$