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CSEC Chemistry · May/June 2017 · Paper 2 · Question 1(e)(iii)

Determine the volume of oxygen produced after 10 s using the value obtained from (e) (ii).

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  1. 1(a)The rate of the reaction for EACH quantity of catalyst used was calculated and recorded in Table 1. Use the balances shown in Figure 1 on page 5 to complete…[5 marks]
  2. 1(b)Define the term 'rate of reaction'.[1 mark]
  3. 1(c)Write a balanced chemical equation to show the decomposition of hydrogen peroxide.[2 marks]
  4. 1(d)Using the axes in Figure 2 on page 7, plot a graph of rate of reaction versus mass of manganese(IV) oxide from the information in Table 1. One point has…[5 marks]
  5. 1(e)(i)Using your graph, describe the relationship between the rate of reaction and the mass of the catalyst.[2 marks]
  6. 1(e)(ii)Using your graph, determine the rate of reaction using 3.0 g of the catalyst.[1 mark]
  7. 1(f)Complete and label the energy profile diagram in Figure 3 to show how a catalyst affects the rate of reaction.[2 marks]
  8. 1(g)Draw a labelled diagram of the apparatus (including reagents) that was used to conduct the experiment and collect the gas.[4 marks]
  9. 1(h)List TWO other factors which can affect the rate of reaction.[2 marks]

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