Al2(SO4)3 → Al(OH)3 → Al2O3 → AICI3 → Al(OH)3 → Al(OH)2CI

9) Aluminum sulfate reacts with a base to form aluminum hydroxide. Aluminum hydroxide decomposes upon heating to aluminum oxide and water. Aluminum oxide reacts with chlorine to form aluminum chloride and oxygen. Aluminum chloride reacts with a base to form aluminum hydroxide. Aluminum hydroxide reacts with hydrochloric acid to form aluminum chlorohydroxide.