Fe(NO₃)₃→Fe₂O₃→FeCl₃→Fe(OH)₃→Fe₂O₃→Fe
4Fe(NO₃)₃ (t)= 2Fe₂O₃ + 12NO₂↑ + 3O₂↑
Fe₂O₃ + HCI = FeCl₃ +H₂O
FeCl₃ + 3NaOH = Fe(OH)₃↓+ 3NaCI
2Fe(OH)₃ + t = Fe₂O₃+ 3H₂O
2Fe₂O₃ + 6H₂ = 4Fe + 6H₂O
MgCO₃→MgO→MgCl₂→Mg(OH)₂→Mg(NO₃)₂→MgO→MgCO₃
MgCO₃ + t = MgO + CO₂↑
MgO + HCI = MgCl₂ +H₂O
MgCl₂ + NaOH = Mg(OH)₂↓ + NaCI
Mg(OH)₂ + HNO₃ = Mg(NO₃)₂ +H₂O
2Mg(NO₃)₂ = 2MgO + 4NO₂↑ + O2↑
MgO + CO₂= MgCO₃