Ion Tests

Question 1

Describe the test for aqueous sulfate ions

Answer 1

• a few drops of dilute hydrochloric acid are added to the sample solution which is then shaken.
• a few drops of barium chloride solution are then added
• a white precipitate of barium sulfate forms if the sample contains sulfate ions

Question 2

Test for carbonate ions

Answer 2

• carbon dioxide is given off when an acid is added to a substance containing carbonate ions.
• limewater is used to confirm the identity of the gas.
• limewater turns milky when carbon dioxide is bubbled through it

Question 3

Describe the test for chloride ions

Answer 3

• a few drops of dilute nitric acid added to the sample solution which is then shaken
• a few drops of silver nitrate solution are added
• a white precipitate of silver chloride forms if the sample contains chloride ions