Testing for chlorides (Cl^-), bromides (Br^-) and iodides (I^-)
3 marks · EasyState the observation when a solution containing iodide ions is tested with silver nitrate.
State the observation when a solution containing chloride ions is tested with silver nitrate.
State the observation when a solution containing bromide ions is tested with silver nitrate.
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(a) Yellow precipitate forms.
(b) White precipitate forms.
(c) Cream precipitate forms.
Common mistakes: Mixing up white/yellow/cream precipitates
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Marking points
B1 (a) · 1 mark · Yellow precipitate for iodide ion.
B2 (b) · 1 mark · White precipitate for chloride ion.
B3 (c) · 1 mark · Cream precipitate for bromide ion.
Worked solution
a) Yellow precipitate for iodide ions. b) White precipitate for chloride ions. c) Cream precipitate for bromide ions.