A-LevelChemistryEquilibriaOct/Nov 2010Paper 1 Q91 Mark
The following equilibrium is set up in a mixture of concentrated nitric and sulfuric acids. HNO₃ + H₂SO₄ ⇌ H₂NO₃⁺ + HSO₄⁻ Which row correctly describes the behaviour of each substance in the equilibrium mixture?
AHNO₃ acid, H₂SO₄ acid, H₂NO₃⁺ base, HSO₄⁻ base
BHNO₃ acid, H₂SO₄ base, H₂NO₃⁺ base, HSO₄⁻ acid
CHNO₃ base, H₂SO₄ acid, H₂NO₃⁺ acid, HSO₄⁻ base
DHNO₃ base, H₂SO₄ acid, H₂NO₃⁺ base, HSO₄⁻ acid
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of equilibria within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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