Fe+2HCl\(\rightarrow\)FeCl2+H2\(\uparrow\)
BaCO3+2HCl\(\rightarrow\)BaCl2+CO2\(\uparrow\)+H2O
FeS+2HCl\(\rightarrow\)FeCl2+H2S\(\uparrow\)
MnO2+4HCl\(\rightarrow\)MnCl2+Cl2\(\uparrow\)+2H2O
2KMnO4+16HCl\(\rightarrow\)2KCl+2MnCl2+5Cl2\(\uparrow\)+8H2O
BaSO3+2HCl\(\rightarrow\)BaCl2+SO2\(\uparrow\)+H2O