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AS & A Level · AS/A Level

Chemistry

Equilibrium, acids and organic chemistry

Name: ____________________Date: October 10, 2026
  1. 1.

    For N2(g) + 3H2(g) <=> 2NH3(g), the forward reaction is exothermic. Explain how increasing pressure and increasing temperature affect equilibrium yield of ammonia.

    [3 marks] · no calculator
  2. 2.

    Calculate the pH of 0.020 mol dm^-3 hydrochloric acid, assuming complete dissociation.

    [3 marks]
  3. 3.

    Explain why refluxing ethanol with excess acidified potassium dichromate(VI) forms ethanoic acid, while distilling the product early can yield ethanal.

    [4 marks] · no calculator

Original, unofficial practice questions from SubjectScout — not official past-paper questions.

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