Em tham khảo nha:
\(\begin{array}{l}
X:NaHS{O_4}\\
Y:{K_2}S{O_3}\\
2NaHS{O_4} + {K_2}S{O_3} \to {K_2}S{O_4} + N{a_2}S{O_4} + 2S{O_2} + 2{H_2}O\\
Z:Ba{(HS{O_3})_2}\\
{K_2}S{O_3} + Ba{(HS{O_3})_2} \to BaS{O_3} + 2KHS{O_3}\\
Ba{(HS{O_3})_2} + 2NaHS{O_4} \to BaS{O_4} + N{a_2}S{O_4} + 2S{O_2} + 2{H_2}O
\end{array}\)