Question

Viết pt hoàn thành sơ đồ phản ứng sau: 
     1             2           3                4            5
Al → \(Al_2O_3\)→\(AlCl_3\)→\(Al\left(OH\right)_3\)→\(Al_2O_3\)→Al

Answer 1

\(4Al+3O_2->2Al_2O_3\)

\(Al_2O_3+6HCl->2AlCl_3+3H_2\)

Answer 2

\(\left(1\right)4Al+3O_2\rightarrow\left(t^o\right)2Al_2O_3\\\left(2\right)Al_2O_3+6HCl\rightarrow 2AlCl_3+3H_2O\\ \left(3\right)AlCl_3+3KOH\rightarrow Al\left(OH\right)_3+3KCl\\ \left(4\right)2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ \left(5\right)2Al_2O_3\rightarrow\left(\text{đ}pnc,xt\right)4Al+3O_2\)