Em tham khảo nha:
\(\begin{array}{l}
A:{H_2}S{O_4}\\
B:Ba{(OH)_2}\\
C:Ca{(HC{O_3})_2}\\
D:HCl\\
{H_2}S{O_4} + Ba{(OH)_2} \to BaS{O_4} + 2{H_2}O\\
Ca{(HC{O_3})_2} + Ba{(OH)_2} \to CaC{O_3} + BaC{O_3} + 2{H_2}O\\
Ca{(HC{O_3})_2} + 2HCl \to CaC{l_2} + 2C{O_2} + 2{H_2}O\\
Ca{(HC{O_3})_2} + 2KOH \to CaC{O_3} + {K_2}C{O_3} + 2{H_2}O
\end{array}\)