Giải Phương trình phản ứng :\(\eqalign{
& C{l_2} + {H_2}\,\buildrel {as} \over
\longrightarrow \,\,2HCl \cr
& \left( A \right)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left( B \right) \cr
& C{l_2} + {H_2}O \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over
{\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} HCl + HClO \cr
& \left( A \right)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left( B \right)\,\,\,\,\,\,\,\,\left( C \right) \cr} \) \(\eqalign{ & C{l_2} + 2{H_2}O + S{O_2}\,\, \to \,\,2HCl + {H_2}S{O_4} \cr & \left( A \right)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left( B \right) \cr & 2HClO\,\, \to \,\,2HCl + {O_2} \uparrow \cr & \,\,\,\left( C \right)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left( B \right) \cr} \)
