AQA Jun 2017 Paper 1 Q4

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0 4 0 4 . 1 0 4 . 2 When substances P and Q react together to form substance R an equilibrium is established according to the equation P(g) + Q(g)2R(g) The equilibrium constant expression is Kc = [ ] R 2 [ ][ ]QP 1.0 mol of P and 1.0 mol of Q were mixed in a container with volume 1.0 dm3 At equilibrium, x mol of P had reacted. The amount, in moles, of each of P and Q at equilibrium is (1 x). Deduce in terms of x the amount, in moles, of R in the equilibrium mixture. At 298 K the value of the equilibrium constant Kc = 3.6 Calculate a value for the equilibrium concentration, in mol dm3, of R. [1 mark] [3 marks] Equilibrium concentration of R mol dm3 *09* Turn overIB/M/Jun17/7404/1<br />

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