Answer
Amphoteric substances are able to act as acids or bases.
$H_2O$ is an amphoteric substance, being able to act as an acid, donating a proton and becoming $OH^-$, and act as a base, accepting a proton and becoming $H_3O^+$.
Work Step by Step
Amphoteric substances are able to act as acids or bases.
$H_2O$ is an amphoteric substance, being able to act as an acid, donating a proton and becoming $OH^-$, and act as a base, accepting a proton and becoming $H_3O^+$.
