What is amphoteric with example

Amphoteric substances are those that can act as both acids and bases. They have the ability to donate or accept protons depending on the conditions.

An example of an amphoteric substance is water (H2O). In neutral conditions, water does not exhibit acidic or basic properties. However, it can act as an acid by donating a proton (H+) in the presence of a stronger base. On the other hand, water can also act as a base by accepting a proton (H+) in the presence of a stronger acid. This property of water makes it amphoteric.