Chemical Test For Anions

Question 1

Carbonate

Answer 1

• CO2-3
• Add dilute acid
• RESULT: effervesence, CO2

Question 2

Chloride

Answer 2

• Cl-
• Acidify with dilute nitric acid, then add aqueous silver nitrate.
• RESULT: white ppt.

Question 3

Bromide

Answer 3

• Br-
• Acidify with dilute nitric acid, them add aqeous silver nitrate.
• RESULT:Cream ppt

Question 4

Iodide

Answer 4

• I-
• Acidify with dilue nitric acid, then add aqueous silver nitrate.
• RESULT: yellow ppt

Question 5

Nitrate

Answer 5

• NO3-
• Add aqeous sodium hydroxide, then aluminium foil and warm.
• RESULT: ammonia produced.

Question 6

Sulfate

Answer 6

• SO2-3
• Acidify, then add aqueous barium nitrate.
• RESULT: white ppt.

Question 7

Sulfite

Answer 7

• So2-3
• Add dilute hydrochloric acid, warm gently and test for the presence of sulfur dioxide.
• RESULT: Sulfur dioxide produced will turn acidified aqueous potassium manganate from purple to colourless.