Giải thích các bước giải:
\(\begin{array}{l}
1.\\
2KMn{O_4} + 16HCl \to 2Mn{O_2} + 5C{l_2} + 2KCl + 8{H_2}O\\
C{l_2} + {H_2}O \to HCl + HClO\\
Fe + 2HCl \to FeC{l_2} + {H_2}\\
FeC{l_2} + 2AgN{O_3} \to 2AgCl + Fe{(N{O_3})_2}\\
2AgCl \to 2Ag + C{l_2}
\end{array}\)
\(\begin{array}{l}
2.\\
C{l_2} + {H_2} \to 2HCl\\
2FeC{l_2} + C{l_2} \to 2FeC{l_3}\\
2FeC{l_3} + 3Ca{(OH)_2} \to 3CaC{l_2} + 2Fe{(OH)_3}\\
2Fe{(OH)_3} + 3{H_2}S{O_4} \to F{e_2}{(S{O_4})_3} + 6{H_2}O
\end{array}\)
\(\begin{array}{l}
3.\\
Fe + S \to FeS\\
FeS + 2HCl \to FeC{l_2} + {H_2}S\\
2{H_2}S + 3{O_2} \to 2{H_2}O + 2S{O_2}\\
S{O_2} + NaOH \to NaHS{O_3}\\
NaHS{O_3} + NaHS{O_4} \to N{a_2}S{O_4} + S{O_2} + {H_2}O
\end{array}\)
\(\begin{array}{l}
4.\\
Zn + S \to ZnS\\
ZnS + 2HCl \to ZnC{l_2} + {H_2}S\\
2{H_2}S + S{O_2} \to 3S + 2{H_2}O\\
S + {O_2} \to S{O_2}\\
S{O_2} + 2NaOH \to N{a_2}S{O_3} + {H_2}O\\
N{a_2}S{O_3} + 2HCl \to 2NaCl + S{O_2} + {H_2}O
\end{array}\)
\(\begin{array}{l}
5.\\
4Fe{S_2} + 11{O_2} \to 2F{e_2}{O_3} + 8S{O_2}\\
2S{O_2} + 2{H_2}O + {O_2} \to 2{H_2}S{O_4}\\
{H_2}S{O_4} + Fe{(N{O_3})_2} \to FeS{O_4} + HN{O_3}\\
2FeS{O_4} + 2{H_2}S{O_4} \to F{e_2}{(S{O_4})_3} + 2{H_2}O + S{O_2}\\
F{e_2}{(S{O_4})_3} + 6NaOH \to 3N{a_2}S{O_4} + 2Fe{(OH)_3}\\
2Fe{(OH)_3} + 6HCl \to 2FeC{l_3} + 6{H_2}O
\end{array}\)
\(\begin{array}{l}
6.\\
2KMn{O_4} \to 2Mn{O_2} + {O_2} + {K_2}Mn{O_4}\\
S + {O_2} \to S{O_2}\\
2{H_2}S + S{O_2} \to 3S + 2{H_2}O\\
Fe + S \to FeS\\
FeS + 2HCl \to FeC{l_2} + {H_2}S\\
{H_2}S + 2NaOH \to N{a_2}S + 2{H_2}O
\end{array}\)
