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2 marksRates of Reaction

CAPE Chemistry Unit 1 · 2009 · Paper 2 · Question 2(b)(ii)

The data in Table 1 were obtained for the decomposition of nitrogen dioxide at 673 K. NO2 (g) → NO (g) + 1/2 O2(g)

Plot a graph of 1/[NO2] against time, on the grid below. The first and last points have been plotted on the grid.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 2(a)State TWO factors which affect reaction rates.[2 marks]
  2. 2(b)(i)Complete Table 1 by writing the missing values for 1/[NO2].[2 marks]
  3. 2(b)(iii)From your graph, determine the order of the reaction with respect to NO2. Give a reason for your answer.[2 marks]
  4. 2(b)(iv)State the rate law for the reaction.[1 mark]
  5. 2(b)(v)Use the slope of the graph to determine the value and units of the rate constant, k, for the reaction.[2 marks]
  6. 2(c)Several experimental methods, including titrimetry, can be used to determine reaction rates. Suggest TWO OTHER methods which can be used to determine reaction…[2 marks]
  7. 2(d)Outline TWO experimental steps in the determination of the reaction rate of an esterification reaction using titrimetry.[2 marks]

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