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2 marksRates of Reaction

CAPE Chemistry Unit 1 · 2013 · Paper 2 · Question 5(b)(ii)a)

The values of initial rates measured for the reaction S₂O₃²⁻ + 2I⁻ → 2SO₄²⁻ + I₂ are recorded in Table 3.

Calculate the rate constant.

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Other parts of this question

  1. 5(a)(i)With the aid of appropriate Boltzmann distribution curves, (using the axes provided on page 12) describe the effect of Temperature on reaction rates.[4 marks]
  2. 5(a)(ii)With the aid of appropriate Boltzmann distribution curves, (using the axes provided on page 12) describe the effect of Catalyst on reaction rates.[3 marks]
  3. 5(b)(i)Use the information from the table to deduce the rate equation and calculate the overall order of the reaction.[5 marks]
  4. 5(b)(ii)b)Calculate the initial rate of the reaction when [S₂O₃²⁻]₀ = 0.13 mol dm⁻³ and [I⁻]₀ = 0.32 mol dm⁻³.[1 mark]

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