Em tham khảo nha:
\(\begin{array}{l}
a)\\
S{O_2} + {H_2}O \to {H_2}S{O_3}\\
CaO + {H_2}O \to Ca{(OH)_2}\\
{K_2}O + {H_2}O \to 2KOH\\
{P_2}{O_5} + 3{H_2}O \to 2{H_3}P{O_4}\\
b)\\
CaO + 2HCl \to CaC{l_2} + {H_2}O\\
F{e_2}{O_3} + 6HCl \to 2FeC{l_3} + 3{H_2}O\\
{K_2}O + 2HCl \to 2KCl + {H_2}O\\
c)\\
S{O_2} + 2KOH \to {K_2}S{O_3} + {H_2}O\\
{P_2}{O_5} + 6KOH \to 2{K_3}P{O_4} + 3{H_2}O
\end{array}\)