Testing For Anions( test and +ve result)

Question 1

Carbonate ion

Answer 1

CO3 (2-charge), add dilute acid, bubbles of CO2 given off and makes limewater cloudy

Question 2

Sulphate ion

Answer 2

SO4 (2-charge), add acid and barium chloride, white ppt formed

Question 3

Halide ions

Answer 3

Cl- and Br- and I-, add acidified silver nitrate, Cl- white ppt, Br- Cream ppt, I- yellow ppt

Question 4

Nitrate ion

Answer 4

NO3 (-charge), add NaOH and then Al, ammonia produced turning damp red litmus blue

Question 5

Sulfite ion

Answer 5

SO3 (2-charge), add dilute HCl and warm, potassium manganate soaked filter paper turns from purple to colourless