Em tham khảo nha :
\(\begin{array}{l}
a)\\
CuO + 2HCl \to CuC{l_2} + {H_2}O\\
b)\\
Zn + 2HCl \to ZnC{l_2} + {H_2}\\
MgO + 2HCl \to MgC{l_2} + {H_2}O\\
KOH + HCl \to KCl + {H_2}O\\
c)\\
BaC{l_2} + {H_2}S{O_4} \to BaS{O_4} + 2HCl\\
d)\\
Zn + 2HCl \to ZnC{l_2} + {H_2}
\end{array}\)