Most commercial hydrochloric acid is prepared by heating NaCl with concentrated H2SO4. How much sulphuric acid containing 90.0% H2SO4by mass is needed for the production of 200 kg of conc. HCl containing 42.0% HCl by mass?
Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it