A-LevelChemistryEquilibria9701/12 · Feb/Mar 2017 · Q111 Mark

Ammonia is manufactured from nitrogen and hydrogen using the Haber process. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) What is the expression for K for this equilibrium?

A2[NH₃(g)] / ([N₂(g)] + 3[H₂(g)])

B2[NH₃(g)] / ([N₂(g)] × 3[H₂(g)])

C[NH₃(g)]² / ([N₂(g)] + [H₂(g)]³)

D[NH₃(g)]² / ([N₂(g)] × [H₂(g)]³)

✓ Correct answer

D: [NH₃(g)]² / ([N₂(g)] × [H₂(g)]³)

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Topic: Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2017 Paper 1 Variant 2, question 11.

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