Group 7 Ions- Halide ions Flashcards
1
Q
Why is nitric acid added before silver nitrate solution is added?
A
Carbonate ions also produce a white precipitate with silver nitrate solution. The acid reacts with any carbonate ions present. This removes them, so stopping them giving an incorrect positive result for chloride ions.
2
Q
Positive result?
A
If a precipitate forms
3
Q
Chloride ions precipitate? Silver Chloride
A
white
4
Q
Bromide precipitate?
A
Cream
5
Q
Iodide precipitate?
A
Yellow
