C12 - Sulfur Flashcards
1
Q
What is the contact process and outline the stages? [3]
A
An industrial process to produce sulfuric acid / sulfur dioxide is oxidised in the presence of a catalyst / sulfur trioxide is then reacted with water to form sulfuric acid
2
Q
What conditions are required for the contact process? [3]
A
450ᵒC / 2 atm pressure / vanadium oxide catalyst
3
Q
What are the chemical equations that take place in the contact process? [4]
A
S + O₂ → SO₂ 2SO₂ + O₂ ⇌ 2SO₃ SO₃ + H₂SO₄ → H₂S₂O₇ H₂S₂O₇ + H₂O → 2H₂SO₄
4
Q
How is sulfur used in the manufacture of sulfuric acid? [1]
A
Sulfur is burned in air to form sulfur dioxide
