Em tham khảo nha :
\(\begin{array}{l}
2Fe + 3C{l_2} \to 2FeC{l_3}\\
2FeC{l_3} + Cu \to CuC{l_2} + 2FeC{l_2}\\
FeC{l_2} + NaOH \to Fe{(OH)_2} + NaCl\\
NaCl + 2{H_2}O \to C{l_2} + {H_2} + 2NaOH\\
C{l_2} + 2KBr \to B{r_2} + 2KCl\\
B{r_2} + 2Na \to 2NaBr\\
NaBr + AgN{O_3} \to NaN{O_3} + AgBr
\end{array}\)