Đáp án+Giải thích các bước giải:

$3)$ $\text{a) Axit sunfuric + kẽm oxit → Kẽm sunfat + Nước}$

$H_2SO_4$ + $\text{$ZnO$}$ → $\text{$ZnSO_4$}$ +$\text{$H_2O$}$

$\text{b) Natri hiđroxit + lưu huỳnh trioxit → Natri sunfat + Nước}$

$\text{NaOH}$ + $\text{$SO_3$}$ → $\text{$Na_2SO_4$}$ + $\text{$H_2O$}$

$\text{c) Nước + lưu huỳnh đioxit → Axit sunfurơ}$

$\text{$H_2O$}$ + $\text{$SO_2$}$ → $\text{$H_2OSO_3$}$

$\text{d) Nước + canxi oxit → Canxi hiđroxit}$

$\text{$H_2O$}$ + $\text{$CaO$}$ → $\text{$Ca(OH)_2$}$

$\text{e) Canxi oxit + cacbon đioxit→ Canxi cacbonat}$

$\text{$CaO$}$ + $\text{$C_2O$}$ → $\text{$CaCO_3$}$

Em tham khảo nha :

\(\begin{array}{l}
1)\\
a)\\
CaO + {H_2}O \to Ca{(OH)_2}\\
S{O_3} + {H_2}O \to {H_2}S{O_4}\\
b)\\
CaO + 2HCl \to CaC{l_2} + {H_2}O\\
F{e_2}{O_3} + 6HCl \to 2FeC{l_3} + 3{H_2}O\\
c)\\
S{O_3} + 2NaOH \to N{a_2}S{O_4} + {H_2}O\\
2)\\
C{O_2} + {H_2}O \to {H_2}C{O_3}\\
{K_2}O + {H_2}O \to 2KOH\\
2KOH + C{O_2} \to {K_2}C{O_3} + {H_2}O\\
{K_2}O + C{O_2} \to {K_2}C{O_3}\\
3)\\
ZnO + {H_2}S{O_4} \to ZnS{O_4} + {H_2}O\\
2NaOH + S{O_3} \to N{a_2}S{O_4} + {H_2}O\\
{H_2}O + S{O_2} \to {H_2}S{O_3}\\
{H_2}O + CaO \to Ca{(OH)_2}\\
CaO + C{O_2} \to CaC{O_3}
\end{array}\)