7. How Does Aluminum Hydroxide Behave Under Different PH Conditions?

Aluminum hydroxide is amphoteric in nature, meaning it can act as both an acid and a base depending on the pH of the surrounding environment. In acidic conditions, aluminum hydroxide acts as a base and accepts protons to form the aluminum ion (Al3+) and water (H2O). In basic conditions, aluminum hydroxide acts as an acid and donates protons to form the aluminate ion (Al(OH)4-) and water. At neutral pH, aluminum hydroxide exists primarily in its insoluble form as a gel-like substance. This property makes aluminum hydroxide useful as an antacid to neutralize stomach acid, where it reacts with gastric acid to form a less harmful compound.