Hydrochloric acid also is made by the Hargreaves process in which a mixture of salt, sulfur dioxide, oxygen, and water are heated at elevated temperatures, between 430 to 540°C. The reaction is exothermic and becomes selfsustaining: 4NaCl + SO2 + O2 + 2H2O→ 2Na2SO4 + 4HCl ...
Hydrochloric acid also is made by the Hargreaves process in which a mixture of salt, sulfur dioxide, oxygen, and water are heated at elevated temperatures, between 430 to 540°C. The reaction is exothermic and becomes selfsustaining: 4NaCl + SO2 + O2 + 2H2O→ 2Na2SO4 + 4HCl ...