04. Testing for the halogen group

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8 Terms

1
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What are the observations?

Chloride ion = white, bromide ion = cream, iodide ion = yellow

2
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What is the method for testing for halogen group?

1) Add 5 drops sodium hydroxide 2) Add 10 drops of X 3) Add a few drops of nitric acid 4) 8 drops of silver nitrate 4) Add dilute ammonia followed by concentrated ammonia

3
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Why is sodium hydroxide added?

Remove halide ion from carbon chain

4
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Why is nitric acid added?

To neutralize the alkaline sodium hydroxide

5
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What are chloride’s reactions with ammonia?

Redissolves in dilute and concentrated ammonia

6
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What are bromide’s reactions with ammonia?

Does not redissolve in dilute but does in concentrated ammonia

7
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What are iodide’s reactions with ammonia?

Does not redissolve in dilute or concentrated ammonia

8
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Draw the hydrolysis by aqueous base, followed by reaction with AgNO3(aq) / HNO3(aq)

Yes