Đáp án:

 Bạn tham khảo lời giải ở dưới nhé !

Giải thích các bước giải:

\(\begin{array}{l}
Na + {H_2}O \to NaOH + \dfrac{1}{2}{H_2}\\
2NaOH + {H_2}S{O_4} \to N{a_2}S{O_4} + 2{H_2}O\\
N{a_2}S{O_4} + BaC{l_2} \to BaS{O_4} + 2NaCl\\
2NaCl + 2{H_2}O \to 2NaOH + {H_2} + C{l_2}\\
6NaOH + F{e_2}{(S{O_4})_3} \to 3N{a_2}S{O_4} + 2Fe{(OH)_3}\\
2Fe{(OH)_3} + 3{H_2}S{O_4} \to F{e_2}{(S{O_4})_3} + 6{H_2}O\\
F{e_2}{(S{O_4})_3} + 2Al \to A{l_2}{(S{O_4})_3} + 2Fe\\
A{l_2}{(S{O_4})_3} + 6NaOH \to 3N{a_2}S{O_4} + 2Al{(OH)_3}\\
2Al{(OH)_3} \to A{l_2}{O_3} + 3{H_2}O\\
2A{l_2}{O_3} \to 4Al + 3{O_2}\\
2Al + 6HCl \to 2AlC{l_3} + 3{H_2}
\end{array}\)

2,

a, 

\(\begin{array}{l}
K + {H_2}O \to KOH + \dfrac{1}{2}{H_2}\\
Ca + 2{H_2}O \to Ca{(OH)_2} + {H_2}
\end{array}\)

b,

\(\begin{array}{l}
2K + {H_2}S{O_4} \to {K_2}S{O_4} + {H_2}\\
Ca + {H_2}S{O_4} \to CaS{O_4} + {H_2}\\
Mg + {H_2}S{O_4} \to MgS{O_4} + {H_2}\\
2Al + 3{H_2}S{O_4} \to A{l_2}{(S{O_4})_3} + 3{H_2}
\end{array}\)

c,

\(\begin{array}{l}
K + {H_2}O \to KOH + \dfrac{1}{2}{H_2}\\
2KOH + FeS{O_4} \to {K_2}S{O_4} + Fe{(OH)_2}\\
Ca + 2{H_2}O \to Ca{(OH)_2} + {H_2}\\
Ca{(OH)_2} + FeS{O_4} \to CaS{O_4} + Fe{(OH)_2}\\
Mg + FeS{O_4} \to MgS{O_4} + Fe\\
2Al + 3FeS{O_4} \to A{l_2}{(S{O_4})_3} + 3Fe
\end{array}\)

d,

\(\begin{array}{l}
K + {H_2}O \to KOH + \dfrac{1}{2}{H_2}\\
2KOH + CuC{l_2} \to 2KCl + Cu{(OH)_2}\\
Ca + 2{H_2}O \to Ca{(OH)_2} + {H_2}\\
Ca{(OH)_2} + CuC{l_2} \to CaC{l_2} + Cu{(OH)_2}\\
Mg + CuC{l_2} \to MgC{l_2} + Cu\\
2Al + 3CuC{l_2} \to 2AlC{l_3} + 3Cu
\end{array}\)