Em tham khảo nha :
\(\begin{array}{l}
a)\\
{H_2} + S \xrightarrow{t^0} {H_2}S\\
4C{l_2} + 4{H_2}O + {H_2}S \to {H_2}S{O_4} + 8HCl\\
{H_2}S{O_4} + BaC{l_2} \to BaS{O_4} + 2HCl\\
2HCl \xrightarrow{dpdd} {H_2} + C{l_2}\\
b)\\
4Fe{S_2} + 11{O_2} \xrightarrow{t^0} 8S{O_2} + 2F{e_2}{O_3}\\
S{O_2} + {H_2}O + B{r_2} \to {H_2}S{O_4} + 2HBr\\
2HBr + 2Na \to NaBr + {H_2}\\
2NaBr + C{l_2} \to 2NaCl + B{r_2}\\
c)\\
2S{O_2} + {O_2} \xrightarrow{t^0,V_2O_5} 2S{O_3}\\
S{O_3} + {H_2}O \to {H_2}S{O_4}\\
{H_2}S{O_4} + BaC{l_2} \to BaS{O_4} + 2HCl\\
2HCl \xrightarrow{dpdd} {H_2} + C{l_2}\\
d)\\
S{O_2} + 2NaOH \to N{a_2}S{O_3} + {H_2}O\\
2N{a_2}S{O_3} + {O_2} \to 2N{a_2}S{O_4}\\
N{a_2}S{O_4} + BaC{l_2} \to 2NaCl + BaS{O_4}\\
NaCl + AgN{O_3} \to AgCl + NaN{O_3}
\end{array}\)
