Ответ:
Fe2O3 +3H2SO4⇒ Fe2(SO4)3 + 3H2O
Fe2(SO4)3 +6NaOH⇒2Fe(OH)3 + 3Na2SO4
Fe(OH)3 + 3HCl⇒FeCl3+ 3H2O
а)Na2O+H2O=2NaOH
б)Na2O+2 HCl=NaCl2+H2O
в)Na2O+H2SO4=Na2SO4+2 H2O
Al₂O₃ = 2Al + 1,5 O₂ (электролиз)
2Al + 6HCl = 2AlCl₃ + 3H₂
AlCl₃ + 3KOH = Al(OH)₃ + 3KCl
Al(OH)₃ + 3HCl = AlCl₃ + 3H₂O
2Al(OH)₃ + Na₂O = 2NaAlO₂ + 3H₂O
4Al + 3O₂ = 2Al₂O₃
Al₂O₃ + 6HCl = 2AlCl₃ + 3H₂O
Al₂O₃ + 2NaOH = 2NaAlO₂ + H₂O
В)AI
2Al + 2NaOH(конц.) + 6H2O = 2Na[Al(OH)4] + 3H2↑