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5.3 Equilibria

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Question 18
H

A mixture of nitrogen, hydrogen and ammonia is at dynamic equilibrium in a sealed container.

N2(g)+3H2(g)⇌2NH3(g) \mathrm{N_{2}(g) + 3H_{2}(g) \rightleftharpoons 2NH_{3}(g)} N2​(g)+3H2​(g)⇌2NH3​(g)

More nitrogen is added. The temperature and volume are kept the same.

When equilibrium is reached again, how have the amounts of hydrogen and ammonia changed compared with the original equilibrium?

[1]
A

Hydrogen: decreased; ammonia: increased

B

Hydrogen: increased; ammonia: increased

C

Hydrogen: decreased; ammonia: decreased

D

Hydrogen: unchanged; ammonia: increased

Markscheme

5.3 Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.3 Equilibria

47 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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