Write two reactions to explain amphoteric nature of water .

Explanation

The reaction which explain the amphoteric nauture of water are:
`underset("acid")(H_(2)O(l))+NH_(3)(aq) Leftrightarrow OH^(-)(aq)+NH_(4)^(-)(aq)`
`underset("Base")(H_(2)O(l))+H_(2)S(aq) Leftrightarrow H_(3)O^(+)(aq)+HS^(-)(aq)`