Em tham khảo nha :
\(\begin{array}{l}
1)\\
a)\\
CaO + {H_2}O \to Ca{(OH)_2}\\
S{O_2} + {H_2}O \to {H_2}S{O_3}\\
C{O_2} + {H_2}O \to {H_2}C{O_3}\\
b)\\
S{O_2} + 2KOH \to {K_2}S{O_3} + {H_2}O\\
C{O_2} + 2KOH \to {K_2}C{O_3} + {H_2}O\\
c)\\
CaO + {H_2}S{O_4} \to CaS{O_4} + {H_2}O\\
d)\\
\text{Khí CO,NO được làm khô bằng CaO}\\
2)\\
S + {O_2} \to S{O_2}\\
S{O_2} + 2KOH \to {K_2}S{O_3} + {H_2}O\\
{K_2}S{O_3} + 2HCl \to 2KCl + S{O_2} + {H_2}O\\
S{O_2} + Ca{(OH)_2} \to CaS{O_3} + {H_2}O\\
CaS{O_3} + 2HCl \to CaC{l_2} + S{O_2} + {H_2}O
\end{array}\)
