Water is an amphoteric oxide. Justify this statement.

Explanation

Water is an amphoteric oxide. It has the ability to accept as well as donate protons and hence it can act , as an acid or a base. For example, in the reaction with HCl it accepts proton where as in the reaction with weak base ammonia it donates proton.
`NH_3+H_2OtoNH_4^++OH^-`
`HCl+H_2OtoH_3O^++Cl^-`