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An amphoretic substance is one that can act as either an acid or a base, depending on the reaction it is involved in. This means it can either accept or donate a proton. Water is a common example of an amphoretic substance.
A water molecule can act as an acid when it donates a proton (H+) to another substance, such as a base. This results in the formation of a hydronium ion (H3O+).
An amphiprotic molecule or ion can act as either an acid or a base. It has the ability to donate or accept a proton depending on the reaction conditions. Water is a common example of an amphiprotic molecule.
NO2 is not a base. It is a nitrogen dioxide molecule which can act as an acidic gas when dissolved in water, forming nitric acid.
Am amphoteric substance can react as a base but also as an acid.
A water molecule can act as both an acid and a base because it has the ability to donate a hydrogen ion (H+) to behave as an acid or accept a hydrogen ion to behave as a base. This property is known as amphiprotic or amphoteric.
A carboxylic acid functional group (-COOH) can cause an organic molecule to act as an acid. It donates a proton (H+) in solution, making the molecule acidic.
Ammonia is a base. When ammonia is dissolved in water it produces an alkaline solution which can be neutralised by acids to produce ammonium salts. So it is a base.
NO2 can act as both an acid and a base in water. When dissolved in water, NO2 can act as an acid by donating a proton to water, forming nitric acid. It can also act as a base by accepting a proton from water, producing nitrite ions.
Water can act as both an acid and a base, making it amphoteric. It can donate a proton (H+) to behave as an acid or accept a proton to act as a base. This property is known as self-ionization of water.
Al(OH)3 is a base (Aluminum hyroxide)
Hydrogen can be both an acid and a base depending on the context. In the Brønsted-Lowry theory, it can act as an acid by donating a proton (H+) or as a base by accepting a proton. In the Lewis theory, hydrogen can act as a base by donating a pair of electrons.