$H_2+Cl_2\xrightarrow{{t^o}} 2HCl$
$NaCl_{\text{tinh thể}}+H_2SO_{4_{\text{đặc}}}\xrightarrow{{t^o}} NaHSO_4+HCl$
$Cl_2+H_2O\rightleftharpoons HCl+HClO$
$2CH_3Cl+3O_2\xrightarrow{{t^o}} 2CO_2+2H_2O+2HCl$
$SO_2+Cl_2+2H_2O\to 2HCl+H_2SO_4$
$H_2S+Cl_2\to S+2HCl$
$NH_4Cl\xrightarrow{{t^o}} NH_3+HCl$
$3Cl_2+2NH_3\to N_2+6HCl$
$2HClO\to 2HCl+O_2$
$C_2H_6+Cl_2\xrightarrow{{as}} C_2H_5Cl+HCl$
