Test for halide ions

Question 1

What is used to test for halide ions

Answer 1

Silver nitrate solution

Question 2

How do you test for halide ions

Answer 2

1. Dissolve spatula measure of solid sample in dilute nitric acid
2. Add 1cm^3 of silver nitrate solution
3. Add 1cm^3 of dilute ammonia solution
4. Add excess dilute ammonia solution
5. If precipitate remains then repeat the process using concentrated ammonia solution in place of dilute ammonia solution

Question 3

What are the deductions if the observation is a white ppt which is soluble in dilute ammonia solution to form a colourless solution

Answer 3

Chloride ion

White ppt is AgCl

Question 4

What are the deductions if the observation is a cream ppt, which is not soluble in dilute ammonia solution but is soluble in concentrated ammonia solution to form a colourless solution

Answer 4

Bromide ion

Cream ppt is AgBr

Question 5

What are the deductions if the observation is a yellow ppt, which is not soluble in either dilute ammonia solution or concentrated ammonia solution

Answer 5

Iodide ions

Yellow ppt is AgI

Question 6

What are the deductions if the observation is no ppt forms

Answer 6

No halide ions present