Chemical tests: Anions (Negative Ions) Flashcards
1
Q
What is the test for Halides (Group 7 ions)
A
Add dilute Nitric Acid (HNO3), followed by silver nitrate solution (AgNO3), and observe precipitate
2
Q
What does a chloride ion produce
A
White precipitate (Silver Chloride)
3
Q
What does a bromide ion produce
A
Cream precipitate (Silver bromide)
4
Q
What does an iodide ion produce
A
Yellow precipitate (Silver iodide)
5
Q
Why is the dilute Nitric acid added
A
To remove carbonate or sulfate ions before the test
6
Q
What is the test for Sulfates?
A
Add dilute HCl, followed by barium chloride solution BaCl2. If a white precipitate is produced then it shows Sulfate ions are present
7
Q
What is the test for Carbonates? CO3 2-
A
Add dilute hydrochloric acid (HCl). If Carbonates are present then carbon dioxide will be released
