NaCl+ H2SO4 $\buildrel{{t^o}}\over\longrightarrow$ NaHSO4+ HCl
MnO2+ 4HCl -> MnCl2+ Cl2+ 2H2O
Cl2+ H2O $\rightleftharpoons$ HCl+ HClO
2HClO -> 2HCl+ O2
NaCl+ AgNO3 -> AgCl+ NaNO3
2AgCl $\buildrel{{t^o}}\over\longrightarrow$ 2Ag+ Cl2
Ca+ Cl2 $\buildrel{{t^o}}\over\longrightarrow$ CaCl2
CaCl2+ H2SO4 $\buildrel{{t^o}}\over\longrightarrow$ CaSO4+ 2HCl