Em tham khảo nha:
\(\begin{array}{l}
1)\\
4Na + {O_2} \xrightarrow{t^0} 2N{a_2}O\\
N{a_2}O + {H_2}O \to 2NaOH\\
2NaOH + C{O_2} \to N{a_2}C{O_3} + {H_2}O\\
N{a_2}C{O_3} + 2HCl \to 2NaCl + C{O_2} + {H_2}O\\
C{O_2} + {H_2}O \to {H_2}C{O_3}\\
2)\\
2Mg + {O_2} \xrightarrow{t^0} 2MgO\\
MgO + 2HCl \to MgC{l_2} + {H_2}O\\
MgC{l_2} + 2AgN{O_3} \to Mg{(N{O_3})_2} + 2AgCl\\
Mg{(N{O_3})_2} + 2NaOH \to Mg{(OH)_2} + 2NaN{O_3}\\
Mg{(OH)_2} \xrightarrow{t^0} MgO + {H_2}O\\
3)\\
Fe + 2HCl \to FeC{l_2} + {H_2}\\
FeC{l_2} + 2AgN{O_3} \to Fe{(N{O_3})_2} + 2AgCl\\
Fe{(N{O_3})_2} + 2NaOH \to Fe{(OH)_2} + 2NaN{O_3}\\
Fe{(OH)_2} + {H_2}S{O_4} \to FeS{O_4} + 2{H_2}O\\
FeS{O_4} + Mg \to MgS{O_4} + Fe
\end{array}\)
