ĐỀ TRONG Ảnh ạ Em cảm ơn

Em tham khảo nha:

\(\begin{array}{l}
a)\\
4FeS + 7{O_2} \xrightarrow{t^0} 2F{e_2}{O_3} + 4S{O_2}\\
S{O_2} + B{r_2} + 2{H_2}O \to {H_2}S{O_4} + 2HBr\\
F{e_2}{O_3} + 3{H_2}S{O_4} \to F{e_2}{(S{O_4})_3} + 3{H_2}O\\
b)\\
CaC{O_3} \xrightarrow{t^0} CaO + C{O_2}\\
CaO + 2HBr \to CaB{r_2} + {H_2}O\\
CaB{r_2} + C{l_2} \to CaC{l_2} + B{r_2}\\
CaC{l_2} + 2AgN{O_3} \to Ca{(N{O_3})_2} + 2AgCl\\
Ca{(N{O_3})_2} + N{a_2}S{O_4} \to CaS{O_4} + 2NaN{O_3}\\
c)\\
4Na + {O_2} \xrightarrow{t^0} 2N{a_2}O\\
N{a_2}O + {H_2}O \to 2NaOH\\
2NaOH + S{O_2} \to N{a_2}S{O_3} + {H_2}O\\
N{a_2}S{O_3} + 2HCl \to 2NaCl + S{O_2} + {H_2}O\\
S{O_2} + 2KOH \to {K_2}S{O_3} + {H_2}O\\
{K_2}S{O_3} + {H_2}S{O_4} \to {K_2}S{O_4} + S{O_2} + {H_2}O
\end{array}\)