A-LevelChemistryEquilibriaOct/Nov 2020Paper 1 Q101 Mark
Sulfur dioxide and oxygen react to form sulfur trioxide. The reaction is reversible. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) Kp = 2.96 × 10⁻⁹ Pa⁻¹ at 700 °C The reaction is allowed to reach equilibrium at 700 °C. The partial pressure of O₂(g) is 375 kPa and the partial pressure of SO₃(g) is 20.3 kPa. What is the partial pressure of SO₂(g)?
A19.3 kPa
B609 kPa
C18 300 kPa
D609 000 kPa
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The correct answer is B. This question tests the candidate's understanding of equilibria within the Chemistrysyllabus. The examiner's mark scheme requires...
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