Halide ions with sulfuric acid

Question 1

Halide ion and sulfuric acid equation

Answer 1

H2SO4(l) + X-(aq) → HX(g) + HSO4-(aq)

(general equation)

where X is the halide ion

Question 2

Sodium chloride and sulfuric acid equation

Answer 2

H2SO4 (l) + NaCl (s) → HCl (g) + NaHSO4 (s)

Question 3

Sodium chloride and sulfuric acid observation

Answer 3

White fumes

Question 4

Sodium bromide and sulfuric acid equation (2 steps)

Answer 4

H2SO4 (l) + NaBr (s) → HBr (g) + NaHSO4 (s)
2HBr (g) + H2SO4 (l) → Br2 (g) + SO2 (g) + 2H2O (l)

Question 5

bromine ions and sulfuric acid observation

Answer 5

red brown Br2 gas

Question 6

sodium iodide and sulfuric acid equation (4 steps)

Answer 6

H2SO4 (l) + NaI (s) → HI (g) + NaHSO4 (s)
2HI (g) + H2SO4 (l) → I2 (g) + SO2 (g) + 2H2O (l)
6HI (g) + H2SO4 (l) → 3I2 (g) + S (s) + 4H2O (l)
8HI (g) + H2SO4 (l) → 4I2 (g) + H2S (s) + 4H2O (l)

Question 7

sodium iodide and sulfuric acid equation

Answer 7

purple iodine gas vapour
yellow S solid
H2S gas strong bad egg smell