Hoàn thành chuỗi phản ứng sau:

(1) $4Al+3O_2\stackrel{t^{°}}{\to }2A{l}_2{O}_3$

(2) Al₂O₃ + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂O

(3) Al₂(SO₄)₃ + 6NaOH → 2Al(OH)₃↓ + 3Na₂SO₄

(4) $2Al{\left(OH\right)}_3\stackrel{t^{°}}{\to }A{l}_2{O}_3+3H_{2}O$

(5) $2A{l}_2{O}_3\stackrel{dpnc}{\to }4Al+3O_2\uparrow$

(6) 2Al + 2NaOH + 2H₂O → 2NaAlO₂ + 3H₂↑

(7) NaAlO₂ + CO₂ + 2H₂O → Al(OH)₃↓ + NaHCO₃

(8) Al(OH)₃ + 3HCl → AlCl₃ + 3H₂O