Em tham khảo nha:
\(\begin{array}{l}
Ba + C{l_2} \to BaC{l_2}\\
Ca + C{l_2} \to CaC{l_2}\\
2Ba + {O_2} \to 2BaO\\
2Ca + {O_2} \to 2CaO\\
Ca + {H_2} \to Ca{H_2}\\
Ba + {H_2} \to Ba{H_2}\\
Ba + 2{H_2}O \to Ba{(OH)_2} + {H_2}\\
Ca + 2{H_2}O \to Ca{(OH)_2} + {H_2}\\
Ba + 2HCl \to BaC{l_2} + {H_2}\\
Ca + 2HCl \to CaC{l_2} + {H_2}
\end{array}\)