Em tham khảo nha:
\(\begin{array}{l}
CuO + {H_2}S{O_4} \to CuS{O_4} + {H_2}O\\
Mg + {H_2}S{O_4} \to MgS{O_4} + {H_2}\\
F{e_3}{O_4} + 4{H_2}S{O_4} \to FeS{O_4} + F{e_2}{(S{O_4})_3} + 4{H_2}O\\
A:CuS{O_4},MgS{O_4},FeS{O_4},F{e_2}{(S{O_4})_3}\\
CuS{O_4} + 2NaOH \to Cu{(OH)_2} + N{a_2}S{O_4}\\
MgS{O_4} + 2NaOH \to Mg{(OH)_2} + N{a_2}S{O_4}\\
FeS{O_4} + 2NaOH \to Fe{(OH)_2} + N{a_2}S{O_4}\\
F{e_2}{(S{O_4})_3} + 6NaOH \to 2Fe{(OH)_3} + 3N{a_2}S{O_4}\\
4Fe{(OH)_2} + {O_2} + 2{H_2}O \to 4Fe{(OH)_3}\\
B:Cu{(OH)_2},Mg{(OH)_2},Fe{(OH)_3}\\
Cu{(OH)_2} \xrightarrow{t^0} CuO + {H_2}O\\
Mg{(OH)_2} \xrightarrow{t^0} MgO + {H_2}O\\
2Fe{(OH)_3} \xrightarrow{t^0} F{e_2}{O_3} + 3{H_2}O\\
X:CuO,MgO,F{e_2}{O_3}\\
CuO + CO \xrightarrow{t^0} Cu + C{O_2}\\
MgO + CO \xrightarrow{t^0} Mg + C{O_2}\\
F{e_2}{O_3} + 3CO \xrightarrow{t^0} 2Fe + 3C{O_2}\\
D:Cu,Mg,Fe
\end{array}\)
