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Chemical equilibria, Le Chatelier’s principle and Kc​

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Question 8

In an industrial synthesis of methanol, a mixture of 1.50 mol of carbon monoxide and 3.00 mol of hydrogen is allowed to reach equilibrium in a sealed vessel at a constant temperature:

CO(g)+2H2(g)⇌CH3OH(g) \text{CO}(\text{g}) + 2\text{H}_2(\text{g}) \rightleftharpoons \text{CH}_3\text{OH}(\text{g}) CO(g)+2H2​(g)⇌CH3​OH(g)

At equilibrium, the total amount of the three gases present in the mixture is 3.30 mol.

What is the mole fraction of methanol (CH3OH\text{CH}_3\text{OH}CH3​OH) in the equilibrium mixture?

A

0.1330.1330.133

B

0.1820.1820.182

C

0.2730.2730.273

D

0.5450.5450.545

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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