NaCl+H2O\(\underrightarrow{^{đpmn}}\)NaOH+12H2+12Cl2
H2+Cl2\(\underrightarrow{^{to}}\)2HCl
4FeS2+11O2→2Fe2O3+8SO2
Fe2O3+3H2\(\underrightarrow{^{to}}\)2Fe+3H2O
Fe+2HCl→FeCl2+H2
2H2O\(\underrightarrow{^{đpdd}}\)2H2+O2
2SO2+O2⇌2SO3
SO3+2H2O\(\underrightarrow{^{to}}\)H2SO4
CaCO3\(\underrightarrow{^{to}}\)CaO+CO2
CaO+Cl2\(\underrightarrow{^{to}}\)CaOCl2
2NaOH+Cl2→NaCl+NaClO+H2O