The chemical equation Al(OH)3 -> Al2O3 + H2O

Chemical equation: Al(OH)₃ -> Al₂O₃ + H₂O ->
The equation above shows that when aluminum hydroxide (Al(OH)₃) is thermally decomposed, it forms aluminum oxide (Al₂O₃) and water vapor (H₂O).

Reaction conditions:
The necessary condition for the reaction to occur is high temperature. Aluminum hydroxide needs to be heated up to a temperature of about 300 ⁰C or higher to start the reaction.

Reaction process:
When the temperature is increased, the molecules of aluminum hydroxide begin to decompose. During the decomposition process, the hydrogen and oxygen atoms in the aluminum hydroxide molecule will combine to form water vapor, while the aluminum atoms will combine with the remaining oxygen atoms to form aluminum oxide.

Occurring phenomenon:
When the reaction occurs, the white solid of aluminum hydroxide will gradually disappear, replaced by the appearance of the white solid of aluminum oxide. Simultaneously, there is the phenomenon of water vapor escaping from the reaction.