Test for Anions

Question 1

Describe the test and test results(2) for CARBONATES

Answer 1

Test: Add a dilute acid
Result: Carbon dioxide gas released; effervescence.

Question 2

Describe the test and test result for CHLORIDES, BROMIDES and IODIDES. What colors will the precipitates be?

Answer 2

Test: Acidify with dilute Nitric acid and and add Silver Nitrate.

Results:

• Chlorine: White
• Bromine: Cream
• Iodine: Yellow

Question 3

Describe the test and results for Nitrates.

Answer 3

Test:Add Sodium Hydroxide solution; add aluminum foil; warm carefully.

Result:Ammonia is produced.

Question 4

Describe the test for SULPHATES

Answer 4

Test: Acidify; add Barium Nitrate.

Result: White precipitate.

Question 5

Describe the test for SULPHITES.

Answer 5

Test: In a solid or solution, add warmed dilute hydrochloric acid.
Result: Sulfur dioxide gas is released, which turn aqueous potassium manganate(VII), MnO4- from purple to colorless.