\(2Al+3Cl_2\rightarrow\left(t^o\right)2AlCl_3\)
\(\left(2\right)AlCl_3+3NaOH\rightarrow\left(t^o\right)Al\left(OH\right)_3+3NaCl\)
\(\left(3\right)2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\)
\(\left(4\right)Al_2O_3+3H_2SO_4\left(l\right)\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)