8C 3. Reactions of halides with sulfuric acid (p.214)

Question 1

What do you observe when concentrated sulfuric acid is added to sodium chloride (NaCl)? What does it produce?

Answer 1

• misty fumes

- hydrogen chloride (HCl)

Question 2

What do you observe when concentrated sulfuric acid is added to sodium bromide (NaB)? What does it produce? (1/3)

Answer 2

• misty fumes

- hydrogen bromide (HBr)

Question 2

What do you observe when concentrated sulfuric acid is added to sodium iodide (NaI)? What does it produce? (1/5)

Answer 2

• misty fumes

- hydrogen iodide (HI)

Question 3

What do you observe when concentrated sulfuric acid is added to sodium bromide (NaB)? What does it produce? (2/3)

Answer 3

• brown fumes

- bromine (Br2)

Question 4

What do you observe when concentrated sulfuric acid is added to sodium bromide (NaB)? What does it produce? (3/3)

Answer 4

• colourless gas with choking smell

- sulfur dioxide (SO2)

Question 5

What do you observe when concentrated sulfuric acid is added to sodium iodide (NaI)? What does it produce? (2/5)

Answer 5

• purple fumes or black solid

- iodine (I2)

Question 6

What do you observe when concentrated sulfuric acid is added to sodium iodide (NaI)? What does it produce? (3/5)

Answer 6

• colourless gas with choking smell

- sulfur dioxide (SO2)

Question 7

What do you observe when concentrated sulfuric acid is added to sodium iodide (NaI)? What does it produce? (4/5)

Answer 7

• yellow solid

- sulfur (S)

Question 8

What do you observe when concentrated sulfuric acid is added to sodium iodide (NaI)? What does it produce? (5/5)

Answer 8

• colourless gas with roten egg smell

- hydrogen sulfide (H2S)