Reaction between ammonia and hydrogen chloride forms ____ coloured vapours.
Write the equation for: (a) the preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether the sulphuric acid should be concentrated or dilute. (b) the reaction between hydrogen chloride and ammonia.
(a) Write the equation for: (i) the preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether the sulphuric acid should be concentrated or dilute. (ii) the preparation of ammonia from ammonium chloride and calcium hydroxide. (iii) the reaction of hydrogen chloride with ammonia.