anions test

Question 1

carbonates:

Answer 1

test: reaction with dilute acid then limewater
result: CO₂ forms and turns limewater milky

Question 2

Chlorine, bromine and iodine

Answer 2

test: dilute nitric acid nd silver nitrate
result: white ppt, cream ppt, yellow ppt

Question 3

Nitrate:

Answer 3

test: NaOH(aq) warmed gently
result: ammonia gas formed then test for ammonia gas

Question 4

Sulfate:

Answer 4

test: dilute nitric acid and barium ions (e.g. barium nitrate)
result: white ppt formed

Question 5

Sulfite

Answer 5

test: dilute acid warmed gently and test gas formed
result: sulfur dioxide formed; aqueous potassium manganate goes purple to colourless if SO₂