Halide Ions

Question 1

How do you test for chloride, bromide, and iodide ions in solution?

Answer 1

Add silver nitrate solution. Chloride forms a white precipitate (AgCl), bromide a cream precipitate (AgBr), and iodide a yellow precipitate (AgI).

Question 2

Why is nitric acid added before testing for halide ions with silver nitrate?

Answer 2

To prevent interference from carbonate ions.

Question 3

What color is the precipitate when silver nitrate is added to a solution containing chloride ions?

Answer 3

White (AgCl).

Question 4

What color is the precipitate when silver nitrate is added to a solution containing bromide ions?

Answer 4

Cream (AgBr).

Question 5

What color is the precipitate when silver nitrate is added to a solution containing iodide ions?

Answer 5

Yellow (AgI).

Question 6

What is the reaction that occurs when a halide ion (X-) reacts with silver ions (Ag+)?

Answer 6

Ag+ (aq) + X- (aq) → AgX (s)