Make up the equation: AL2O3 – AL- AL2 (SO4) 3 – Al (OH) 3 – Al2O3

To carry out the above chain of transformations, we need to carry out the following reactions:

We add water to aluminum, as a result of the reaction, aluminum oxide is formed.The chemical formula of this reaction is as follows:

4 Al + 3 O2 = 2 Al2O3

We add sulfuric acid to aluminum oxide, as a result of the reaction, water is formed and aluminum sulfate precipitates.

Al2O3 + 3 H2SO4 = Al2 (SO4) 3 + 3 H2O

Aluminum sulfate interacts with potassium hydroxide, resulting in a substitution reaction, potassium sulfate and aluminum hydroxide are formed.

Al2 (SO4) 3 + 6 KOH = 3 K2SO4 + 2 Al (OH) 3

Aluminum hydroxide decomposes at high temperature into aluminum oxide and water.

2 Al (OH) 3 = Al2O3 + 3 H2O