Test For Anions

Question 1

Carbonate

Answer 1

Test: Add dilute acid
Test result: effervescent, bubbles produced, carbon dioxide produced

Question 2

Chloride

Answer 2

Test: Acidify with dilute nitric acid, add aqueous silver nitrate
Test result: White ppt

Question 3

Bromide

Answer 3

Test: Acidify with dilute nitric acid, then add aqueous silver nitrate
Test result: Cream ppt

Question 4

Iodide

Answer 4

Test: Acidify with dilute nitric acid, then add aqueous silver nitrate
Test result: Yellow ppt

Question 5

Nitrate

Answer 5

Test: add aqueous sodium hydroxide, then aluminium foil, and warm carefully
Test result: Ammonia produced

Question 6

Sulphate

Answer 6

Test: acidify, add aqueous barium nitrate
Test result: White ppt

Question 7

Sulphite

Answer 7

Test: add dilute hydrochloric acid, then warm gently, test for presence of SO2
Test result: SO2 produced will turn potassium manganate(VII) purple to colourless, or will turn potassium dichromate(VI) to green