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Chemical equilibria, Le Chatelier’s principle and Kc​

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Question 2

Which change leads to a higher concentration of PCl5(g)\text{PCl}_5(\text{g})PCl5​(g) in this equilibrium mixture?

PCl5(g)⇌PCl3(g)+Cl2(g)ΔH=+88 kJ mol−1 \text{PCl}_5(\text{g}) \rightleftharpoons \text{PCl}_3(\text{g}) + \text{Cl}_2(\text{g}) \quad \Delta H = +88\text{ kJ mol}^{-1} PCl5​(g)⇌PCl3​(g)+Cl2​(g)ΔH=+88 kJ mol−1
A

a decrease in temperature

B

a decrease in pressure

C

an increase in temperature

D

the addition of a catalyst

Markscheme

Chemical equilibria, Le Chatelier’s principle and Kc Questions

  1. A Level
  2. /Chemistry
  3. /Chemical equilibria, Le Chatelier’s principle and Kc

24 exam-style questions on AQA A Level Chemistry Chemical equilibria, Le Chatelier’s principle and $K_c$, covering Chemical equilibria and Le Chatelier's principle and Equilibrium constant $K_c$ for homogeneous systems. Each one has a worked solution and a mark scheme showing where the marks go.

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