QA Anions

Question 1

Carbonate (CO3 2-)

Answer 1

• add dilute HCl
• pass gas given off into limewater
• effervescence observed
• gas given off form white ppt in limewater (CO2)

Question 2

Sulfate (SO4 2-)

Answer 2

• add dilute nitric acid
• add barium soln
• white ppt of barium sulfate is formed (BaSO4)

Question 3

Chlorine (Cl-)

Answer 3

• add dilute nitric acid
• add silver nitrate soln
• white ppt of silver chloride (AgCl)

Question 4

Iodine (I-)

Answer 4

• add dilute nitric acid
• add silver nitrate soln
• yellow ppt of silver iodide formed (AgI)