Em tham khảo nha :
\(\begin{array}{l}
1)\\
4Al + 3{O_2} \xrightarrow{t^0} 2A{l_2}{O_3}\\
A{l_2}{O_3} + 6HCl \to 2AlC{l_3} + 3{H_2}O\\
AlC{l_3} + 3NaOH \to Al{(OH)_3} + 3NaCl\\
2Al{(OH)_3} \xrightarrow{t^0} A{l_2}{O_3} + 3{H_2}O\\
2A{l_2}{O_3} \xrightarrow{t^0} 4Al + 3{O_2}\\
2)\\
S + {O_2} \xrightarrow{t^0} S{O_2}\\
2S{O_2} + {O_2} \xrightarrow{t^0,V_2O_5} 2S{O_3}\\
S{O_3} + {H_2}O \to {H_2}S{O_4}\\
{H_2}S{O_4} + Zn \to ZnS{O_4} + {H_2}\\
3)\\
C + {O_2} \xrightarrow{t^0} C{O_2}\\
C{O_2} + C \xrightarrow{t^0} 2CO\\
2CO + {O_2} \xrightarrow{t^0} 2C{O_2}\\
C{O_2} + Ca{(OH)_2} \to CaC{O_3} + {H_2}O\\
CaC{O_3} \xrightarrow{t^0} CaO + C{O_2}\\
CaO + {H_2}O \to Ca{(OH)_2}\\
4)\\
Si + {O_2} \xrightarrow{t^0} Si{O_2}\\
Si{O_2} + 2NaOH \to N{a_2}Si{O_3} + {H_2}O\\
N{a_2}Si{O_3} + 2HCl \to {H_2}Si{O_3} + 2NaCl\\
{H_2}Si{O_3} \xrightarrow{t^0} Si{O_2} + {H_2}O\\
5)\\
2Fe + 3C{l_2} \to 2FeC{l_3}\\
FeC{l_3} + 3NaOH \to Fe{(OH)_3} + 3NaCl\\
2Fe{(OH)_3} \xrightarrow{t^0} F{e_2}{O_3} + 3{H_2}O\\
2F{e_2}{O_3} \xrightarrow{t^0} 4Fe + 3{O_2}
\end{array}\)
