\(4Al+3O_2\rightarrow2Al_2O_3\)
\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3\downarrow+3NaCl\)
\(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)
\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)