Em tham khảo nha:
\(\begin{array}{l}
a)\\
4Fe{S_2} + 11{O_2} \xrightarrow{t^0} 2F{e_2}{O_3} + 8S{O_2}\\
2S{O_2} + {O_2} \xrightarrow{t^0,$V_2O_5$} 2S{O_3}\\
S{O_3} + {H_2}O \to {H_2}S{O_4}\\
CuO + {H_2}S{O_4} \to CuS{O_4} + {H_2}O\\
CuS{O_4} + BaC{l_2} \to CuC{l_2} + BaS{O_4}\\
b)\\
Zn + S \xrightarrow{t^0} ZnS\\
ZnS + 2HCl \to ZnC{l_2} + {H_2}S\\
2{H_2}S + S{O_2} \to 3S + 2{H_2}O\\
S + {O_2} \xrightarrow{t^0} S{O_2}\\
S{O_2} + Ba{(OH)_2} \to BaS{O_3} + {H_2}O\\
BaS{O_3} + 2HCl \to BaC{l_2} + S{O_2} + {H_2}O\\
c)\\
S + {O_2} \xrightarrow{t^0} S{O_2}\\
2S{O_2} + {O_2} \xrightarrow{t^0,$V_2O_5$} 2S{O_3}\\
S{O_3} + NaOH \to NaHS{O_4}\\
2NaHS{O_4} + 2KOH \to {K_2}S{O_4} + N{a_2}S{O_4} + 2{H_2}O\\
{K_2}S{O_4} + BaC{l_2} \to 2KCl + BaS{O_4}\\
S + Fe \xrightarrow{t^0} FeS\\
4FeS + 7{O_2} \xrightarrow{t^0} 2F{e_2}{O_3} + 4S{O_2}\\
F{e_2}{O_3} + 3{H_2} \to 2Fe + 3{H_2}O\\
Fe + {H_2}S{O_4} \to FeS{O_4} + {H_2}\\
2Fe + 6{H_2}S{O_4} \to F{e_2}{(S{O_4})_3} + 3S{O_2} + 6{H_2}O\\
FeS{O_4} + 2NaOH \to N{a_2}S{O_4} + Fe{(OH)_2}\\
F{e_2}{(S{O_4})_3} + 6NaOH \to 2Fe{(OH)_3} + 3N{a_2}S{O_4}\\
4Fe{(OH)_2} + {O_2} + 2{H_2}O \to 4Fe{(OH)_3}
\end{array}\)
