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3 marksSulfuric Acid

CAPE Chemistry Unit 2 · 2006 · Paper 2 · Question 4(b)(i)

Using Le Chatelier's principle, predict and explain how the position of equilibrium and the concentration of reactants and products are affected when the temperature is increased while pressure is kept constant.

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  1. 4(a)(i)State Le Chatelier's principle.[2 marks]
  2. 4(a)(ii)Give TWO characteristic features of a system in dynamic equilibrium.[2 marks]
  3. 4(a)(iii)Write an expression for the equilibrium constant, K_p, for the equilibrium system described.[1 mark]
  4. 4(a)(iv)The equilibrium constant, K_p, for this reaction is 4.0 × 10¹⁹ Pa⁻¹ at 25 °C. Use the value of K_p to comment on the position of equilibrium at 25 °C and the…[2 marks]
  5. 4(b)(ii)Using Le Chatelier's principle, predict and explain how the position of equilibrium and the concentration of reactants and products are affected when the…[3 marks]
  6. 4(b)(iii)Using Le Chatelier's principle, predict and explain how the position of equilibrium and the concentration of reactants and products are affected by using a…[2 marks]
  7. 4(c)When a 2:1 mixture of SO₂(g) and O₂(g) at a total initial pressure of 5 atm is passed over a catalyst at 425 °C, the partial pressure of SO₃(g) at equilibrium…[5 marks]

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