Testing for chlorine halides using sulfuric acid Flashcards
Chloride, bromide and iodide ions react with concentrated sulfuric acid to produce
toxic gases
These reactions should therefore be carried out in a
fume cupboard
The general reaction of the halide ions with concentrated sulfuric acid is:
where X is the halide ion
H2SO4(l) + X-(aq) → HX(g) + HSO4-(aq)
where X is the halide ion
Reaction of chloride ions with concentrated sulfuric Acid
Concentrated sulfuric acid is dropwise added to sodium chloride crystals to produce
hydrogen chloride gas
Concentrated sulfuric acid is dropwise added to sodium chloride crystals to produce hydrogen chloride gas
reaction
The HCl gas produced is seen as
H2SO4 (l) + NaCl (s) → HCl (g) + NaHSO4 (s)
white fumes
The reaction of sodium bromide and concentrated sulfuric acid is: