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1 markChlorine

CAPE Chemistry Unit 2 · 2007 · Paper 2 · Question 1(a)(i)

Bromine and chlorine react in tetrachloromethane solvent at room temperature and pressure to establish equilibrium forming bromine chloride, BrCl.

Write the chemical equation for the equilibrium reaction between bromine and chlorine forming BrCl.

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Other parts of this question

  1. 1(a)(ii)Write the expression for the equilibrium constant, K_c.[2 marks]
  2. 1(b)(i)In an experiment to monitor the equilibrium, the mixture contains 0.0389 mol of Br2, 0.0111 mol of Cl2, and 0.0546 mol of BrCl. Given that K_c at 298 K is…[3 marks]
  3. 1(b)(ii)State TWO precautions that should be taken to ensure the experiment yields accurate results.[2 marks]
  4. 1(b)(iii)Suggest ONE safety measure that should be taken in this experiment.[1 mark]
  5. 1(c)Under what experimental condition would the value of K_c be greater than 6.90, given that the reaction is endothermic?[1 mark]

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