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Chemical equilibria, Le Chatelier’s principle and Kc​

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Question 16

The contact process involves the homogeneous gaseous equilibrium shown below:

2SO2(g)+O2(g)⇌2SO3(g) 2\text{SO}_2(\text{g}) + \text{O}_2(\text{g}) \rightleftharpoons 2\text{SO}_3(\text{g}) 2SO2​(g)+O2​(g)⇌2SO3​(g)

In a test mixture, 4.00 mol of sulfur dioxide are mixed with 3.00 mol of oxygen. At equilibrium, the total amount of the three gases present in the mixture is 5.80 mol.

What is the mole fraction of sulfur trioxide at equilibrium?

A

0.2070.2070.207

B

0.2760.2760.276

C

0.3430.3430.343

D

0.4140.4140.414

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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