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Rates of Reaction · CSEC Chemistry

128 past-paper questions on Rates of Reaction, part of Principles of Chemistry, from every CSEC Chemistry paper on Quelpr.

Practise Rates of Reaction
  1. 1(a)1 mark· Chemistry Q1 1(a)Define the term 'rate of reaction'.
  2. 1(a)1 mark· Chemistry Q1 1(a)Define the term 'rate of reaction'.
  3. 1(a)1 mark· Chemistry Q1 1(a)Define 'rate of reaction'.
  4. 1(a)5 marks· Chemistry Q1 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 Table 1.
  5. 1(a)(i)1 mark· Chemistry Q1 1(a)(i)Define the term 'rate of reaction'.
  6. 1(a)(i)3 marks· Chemistry Q1 1(a)(i)From the stopwatches displayed in Figure 1 on page 5, record the times for the hydrogen gas to be collected in Column 3 in Table 1. The time taken for Experiment 1 has already been recorded for you.
  7. 1(a)(i)2 marks· Chemistry Q1 1(a)(i)Complete Figure 1 to show how the gas was collected and measured during the experiment.
  8. 1(a)(i)4 marks· Chemistry Q1 1(a)(i)From the results shown in Figure 1 construct a table to show experiment number, volume of acid added from the burette, volume of water added to the acid, and time taken for the magnesium to disappear.
  9. 1(a)(i)7 marks· Chemistry Q1 1(a)(i)Complete Table 1 below to show, for the concentration of KIO3 solution used, the corresponding times in seconds (s) and the reciprocal times (1/t) at which the blue colour appears.
  10. 1(a)(i)2 marks· Chemistry Q1 1(a)(i)Explain the effect of increasing the concentration of the reactants on the rate of a chemical reaction.
  11. 1(a)(i)4 marks· Chemistry Q1 1(a)(i)In the space below, construct a suitable table and record on it, the temperatures at which the reaction took place with the corresponding times in seconds for the formation of sulphur.
  12. 1(a)(ii)4 marks· Chemistry Q1 1(a)(ii)Using the graph paper on page 4, plot a graph of time taken for the magnesium ribbon to disappear against volume of acid added from the burette.
  13. 1(a)(ii)3 marks· Chemistry Q1 1(a)(ii)Using the graph paper provided on page 5, plot a graph of temperature versus time in seconds.
  14. 1(a)(ii)3 marks· Chemistry Q1 1(a)(ii)Using the same axes in Figure 2, plot a graph of the volume of gas produced versus time for the reaction with marble chips. Four of the points have already been plotted on the graph.
  15. 1(a)(ii)5 marks· Chemistry Q1 1(a)(ii)Using the graph paper on page 5, plot the reciprocal of time against the concentration of KIO3.
  16. 1(a)(ii)2 marks· Chemistry Q1 1(a)(ii)State TWO factors, other than concentration, which affect the rate of a chemical reaction.
  17. 1(a)(ii)3 marks· Chemistry Q1 1(a)(ii)Using the formula Rate = 1/Time, calculate the rate of reaction for each experiment and record these values to 3 decimal places in Column 4 of Table 1. The rate of reaction for Experiment 1 has already been calculated…
  18. 1(a)(iii)5 marks· Chemistry Q1 1(a)(iii)Using the grid provided on page 7, plot a graph of rate versus time for Experiments 1-6. Draw the best curve through the points.
  19. 1(a)(iii)4 marks· Chemistry Q1 1(a)(iii)With reference to the volume of gas produced and the slopes along the two curves on the graph, outline ONE similarity and ONE difference in the volume of carbon dioxide produced from powdered calcium carbonate and from…
  20. 1(a)(iii)3 marks· Chemistry Q1 1(a)(iii)Using the same axes as the graph (Figure 1) on page 3, plot a graph of the volume of oxygen against time using the data in Table 1. The first three points have been plotted for you on the graph.
  21. 1(a)(iii)2 marks· Chemistry Q1 1(a)(iii)Explain the shape of the graph.
  22. 1(a)(iii)1 mark· Chemistry Q1 1(a)(iii)What conclusion can be drawn about the rate of the reaction from the graph?
  23. 1(a)(iii)1 mark· Chemistry Q1 1(a)(iii)Explain the shape of the graph.
  24. 1(a)(iv)2 marks· Chemistry Q1 1(a)(iv)From the graph, determine the time expected to be taken for the appearance of the sulphur precipitate if the reaction were carried out at 50°C. Indicate on your graph how you arrived at your answer.
  25. 1(a)(iv)4 marks· Chemistry Q1 1(a)(iv)Compare the plots obtained from Jonathan's and Karen's results in terms of the slope of the graph and the volume of oxygen produced. Account for the differences between Jonathan's and Karen's results.
  26. 1(a)(iv)1 mark· Chemistry Q1 1(a)(iv)Using the data from the graph determine the time it would take for 25 cm³ of the acid to react with the magnesium ribbon.
  27. 1(a)(v)3 marks· Chemistry Q1 1(a)(v)Figure 1 shows a series of diagrams that represents how the students set up the experiment to determine the effect of the concentration of acid on the rate of the reaction. Identify THREE major flaws in the design of…
  28. 1(a)(v)a)1 mark· Chemistry Q1 1(a)(v)a)Using Karen's graph, determine the volume of oxygen produced in 45 seconds.
  29. 1(a)(vi)1 mark· Chemistry Q1 1(a)(vi)From the graph, the total volume of gas produced is 370 cm³. Suggest a possible reason for the difference in your answer obtained in (v) on page 4 and the volume of gas obtained from the graph.
  30. 1(a)(vii)2 marks· Chemistry Q1 1(a)(vii)State TWO other factors (than the one given in (vi) above) that can affect the rate of reaction between nitric acid and calcium carbonate.
  31. 1(a)(vii)1 mark· Chemistry Q1 1(a)(vii)Explain why it is necessary, for each experiment, to make up the volume of acid to 50 cm³ by adding water.
  32. 1(b)1 mark· Chemistry Q1 1(b)Define the term 'rate of reaction'.
  33. 1(b)3 marks· Chemistry Q1 1(b)Read, from the diagrams in Figure 1 and record in Table 1, the volume of the gas produced for EACH experiment. Experiment 1 has been done for you.
  34. 1(b)(i)5 marks· Chemistry Q1 1(b)(i)From the gas syringes displayed in Figure 1 on page 5, record the volume of gas produced in the appropriate spaces in Table 1. The volume at times 0, 5 and 6 minutes have already been recorded.
  35. 1(b)(i)2 marks· Chemistry Q1 1(b)(i)Based on the graph plotted on page 7, deduce how the rate of the reaction varied with time.
  36. 1(b)(i)2 marks· Chemistry Q1 1(b)(i)Suggest a suitable aim for this experiment.
  37. 1(b)(i)3 marks· Chemistry Q1 1(b)(i)Plot the TOTAL volume of oxygen given off against time, on the graph paper on page 7.
  38. 1(b)(ii)5 marks· Chemistry Q1 1(b)(ii)Use the data in Table 1 to plot a graph of the volume of gas produced against time, using the axes below.
  39. 1(b)(ii)2 marks· Chemistry Q1 1(b)(ii)Explain how the trend in the rate of reaction stated in (b)(i) relates to the surface area of the zinc granules.
  40. 1(b)(ii)2 marks· Chemistry Q1 1(b)(ii)Describe what will happen to the contents of Beaker A after 30 seconds.
  41. 1(b)(ii)2 marks· Chemistry Q1 1(b)(ii)Account for the shape of the graph obtained.
  42. 1(b)(iii)1 mark· Chemistry Q1 1(b)(iii)From your graph, determine the time taken for the reaction to be completed.
  43. 1(b)(iii)3 marks· Chemistry Q1 1(b)(iii)List THREE factors, other than surface area, that affect the rate of a reaction.
  44. 1(b)(iii)1 mark· Chemistry Q1 1(b)(iii)From your graph determine the volume of oxygen gas produced after 50 seconds.
  45. 1(b)(iv)1 mark· Chemistry Q1 1(b)(iv)During which time interval was the rate of reaction fastest?
  46. 1(b)(iv)2 marks· Chemistry Q1 1(b)(iv)How would the contents of Beaker B differ from the contents of Beaker A after each is left for 30 seconds?
  47. 1(b)(v)3 marks· Chemistry Q1 1(b)(v)Explain your answer in (b) (iv).
  48. 1(b)(v)3 marks· Chemistry Q1 1(b)(v)Explain your answer in (iv) above.
  49. 1(b)(vi)1 mark· Chemistry Q1 1(b)(vi)From your graph, determine the volume of gas produced at 2.5 minutes.
  50. 1(c)1 mark· Chemistry Q1 1(c)State ONE safety precaution that Michael and Jennifer may have taken during the experiments.
  51. 1(c)2 marks· Chemistry Q1 1(c)Plan and design an experiment to determine which of the four catalysts above will be most effective in increasing the rate of decomposition of hydrogen peroxide. Write your answer in the spaces provided. Outline of…
  52. 1(c) (diagram)2 marks· Chemistry Q1 1(c) (diagram)Labelled diagram of apparatus to be used:
  53. 1(c)(i)3 marks· Chemistry Q1 1(c)(i)From the stopwatches displayed in Figure 1 on page 4, record the times taken for the carbon dioxide gas to be collected in the appropriate spaces in Table 1. The time taken for Test 1 has already been recorded.
  54. 1(c)(i)3 marks· Chemistry Q1 1(c)(i)From the stopwatches displayed in Figure 1 on page 7, record the times taken for the blue-black colour to appear in the appropriate spaces in Table 1. The time taken for Experiment 1 has already been recorded for you.
  55. 1(c)(i)2 marks· Chemistry Q1 1(c)(i)Draw a CLEARLY labelled diagram of a suitable experimental arrangement for carrying out the investigation in the laboratory.
  56. 1(c)(i)1 mark· Chemistry Q1 1(c)(i)Andrew's second experiment required the use of the same mass of magnesium but in the powdered form instead of strips. State the factor that Andrew is now investigating.
  57. 1(c)(ii)4 marks· Chemistry Q1 1(c)(ii)Calculate the reciprocal times (1/time) and record them to 3 decimal places in the appropriate spaces in Table 1. The reciprocal time for Test 1 has already been calculated.
  58. 1(c)(ii)3 marks· Chemistry Q1 1(c)(ii)Calculate the reciprocal times (1/time) and record them to 3 decimal places in the appropriate spaces in Table 1. One of the times has already been recorded for you.
  59. 1(c)(ii)2 marks· Chemistry Q1 1(c)(ii)State TWO variables that should be controlled during the experiment.
  60. 1(c)(iii)5 marks· Chemistry Q1 1(c)(iii)Using the axes provided in Figure 2 on page 7, plot a graph of reciprocal time versus temperature for Tests 1–6. Draw the best curve through the points.
  61. 1(c)(iii)5 marks· Chemistry Q1 1(c)(iii)Using the axes provided on page 8, plot a graph of concentration of KIO₃ versus reciprocal time for Experiments 1-5, and draw the best straight line through the points.
  62. 1(c)(iii)1 mark· Chemistry Q1 1(c)(iii)State ONE factor, other than the factor investigated by Andrew, which can affect the rate of a reaction.
  63. 1(d)5 marks· Chemistry Q1 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 already been plotted. Circle the plotted points on the graph, and…
  64. 1(d)6 marks· Chemistry Q1 1(d)Compare the volume of gas produced in Experiments 2, 3 and 4, to the volume produced in Experiment 1, and give an explanation in EACH case.
  65. 1(d)2 marks· Chemistry Q1 1(d)Based on the graph drawn in (c) (iii) on page 8, what deduction can be made about the effect of concentration of aqueous KIO₃ on the rate of reaction?
  66. 1(d)1 mark· Chemistry Q1 1(d)Suggest ONE way in which Michael and Jennifer may have controlled the temperature during the experiments.
  67. 1(d)(i)1 mark· Chemistry Q1 1(d)(i)Based on the graph drawn in (c)(iii) on page 7, deduce the effect that temperature has on the rate of reaction.
  68. 1(d)(ii)2 marks· Chemistry Q1 1(d)(ii)State TWO reasons that account for the observed effect, given in (d)(i), of temperature on the rate of reaction.
  69. 1(e)2 marks· Chemistry Q1 1(e)Experiment 6 was carried out using Solution X, which contained an unknown concentration of KIO₃. Using the reciprocal time calculated in Experiment 6, determine from your graph, the concentration of KIO₃ in this…
  70. 1(e)2 marks· Chemistry Q1 1(e)Use the graph drawn on page 7 to determine the value of the reciprocal time that would have been obtained if the experiment was carried out at 40 °C.
  71. 1(e)(i)2 marks· Chemistry Q1 1(e)(i)Using your graph, describe the relationship between the rate of reaction and the mass of the catalyst.
  72. 1(e)(ii)1 mark· Chemistry Q1 1(e)(ii)Using your graph, determine the rate of reaction using 3.0 g of the catalyst.
  73. 1(e)(ii)1 mark· Chemistry Q1 1(e)(ii)Using the same axes in Figure 2, sketch the curve when magnesium granules are used in Experiment 1.
  74. 1(f)2 marks· Chemistry Q1 1(f)Besides temperature, state TWO other factors that affect the rate at which a solute dissolves.
  75. 1(f)(i)1 mark· Chemistry Q1 1(f)(i)State the responding variable.
  76. 1(f)(ii)1 mark· Chemistry Q1 1(f)(ii)State the controlled variable.
  77. 1(h)2 marks· Chemistry Q1 1(h)List TWO other factors which can affect the rate of reaction.
  78. 2(b)(i)1 mark· Chemistry Q2 2(b)(i)Use the data from Figure 3 to determine the total volume of gas produced.
  79. 2(c)(i)1 mark· Chemistry Q2 2(c)(i)What is meant by the term 'rate of reaction'?
  80. 2(c)(ii)2 marks· Chemistry Q2 2(c)(ii)Besides temperature, identify TWO other factors that can affect the rate of the reaction.
  81. 2(c)(iii)a)1 mark· Chemistry Q2 2(c)(iii)a)If the temperature at which the reaction was carried out was changed from 25 °C to 40 °C, would the rate of reaction increase or decrease?
  82. 2(c)(iii)b)2 marks· Chemistry Q2 2(c)(iii)b)Explain your answer.
  83. 2(d)(i)6 marks· Chemistry Q2 2(d)(i)Comment on how the RATE OF REACTION might be affected if the zinc nail is replaced by Magnesium metal. Explain your answer. Observation: (missing) Explanation: (missing)
  84. 2(d)(ii)6 marks· Chemistry Q2 2(d)(ii)Comment on how the RATE OF REACTION might be affected if the zinc nail is replaced by Lead. Explain your answer. Observation: (missing) Explanation: (missing)
  85. 3(a)(i)3 marks· Chemistry Q3 3(a)(i)Name THREE factors OTHER THAN a catalyst, which can affect the rate of a chemical reaction.
  86. 3(a)(ii)a)2 marks· Chemistry Q3 3(a)(ii)a)Based on the information given in Figure 2, deduce whether increased yields of ammonia would result from conditions of high or low temperature.
  87. 3(a)(ii)b)1 mark· Chemistry Q3 3(a)(ii)b)Based on the information given in Figure 2, deduce whether increased yields of ammonia would result from conditions of high or low pressure.
  88. 3(a)(iii)2 marks· Chemistry Q3 3(a)(iii)Suggest TWO reasons why ammonia is not usually produced at 100°C and 1200 atm.
  89. 3(b)(i)2 marks· Chemistry Q3 3(b)(i)Explain why the plots in Figure 4 are different.
  90. 3(b)(ii)a)5 marks· Chemistry Q3 3(b)(ii)a)For 0.80 mol dm⁻³ H₂O₂ and 4.0 g of catalyst, determine the quantity of O₂ produced in 16 seconds.
  91. 4(a)4 marks· Chemistry Q4 4(a)State FOUR factors that can influence the rate of reaction.
  92. 4(b)(i)1 mark· Chemistry Q4 4(b)(i)Use the graph in Figure 4 to determine the total volume of CO₂ produced.
  93. 4(b)(iii)2 marks· Chemistry Q4 4(b)(iii)One of the students suggested that powdered calcium carbonate should have been used instead of chips. State, with reason, how the time for completion of the experiment would have been affected.
  94. 5(a)(ii)2 marks· Chemistry Q5 5(a)(ii)The temperatures currently used in the manufacture of ammonia make the process cost-effective. Suggest ONE reason for this.
  95. 5(b)3 marks· Chemistry Q5 5(b)Suggest reasons for using these reaction conditions. Explain your answer in terms of the equation above.
  96. 5(b)(i)1 mark· Chemistry Q5 5(b)(i)Name the catalyst used in the Haber process.
  97. 5(b)(ii)2 marks· Chemistry Q5 5(b)(ii)Explain the importance of using relatively high pressure in this process.
  98. 5(d)(i)2 marks· Chemistry Q5 5(d)(i)What data must be collected if one wants to measure the rate of the reaction in (a) on page 14?
  99. 5(d)(ii)3 marks· Chemistry Q5 5(d)(ii)Sketch a labelled diagram to illustrate how the data collected in (d) (i) above may be represented.
  100. 5(d)(ii)2 marks· Chemistry Q5 5(d)(ii)Suggest why the reagent you have named in (d) (i) above should be used in the powdered form.
  101. 5(e)(i)2 marks· Chemistry Q5 5(e)(i)State TWO ways in which the rate of a reaction could be increased.
  102. 5(e)(ii)2 marks· Chemistry Q5 5(e)(ii)Explain how ONE of the ways stated in (e) (i) above causes an increase in reaction rate.
  103. 6(c)(i)1 mark· Chemistry Q6 6(c)(i)Select the method by which the lamb will take the LONGEST to cook.
  104. 6(c)(ii)2 marks· Chemistry Q6 6(c)(ii)Outline the principles involved in the functioning of the pressure cooker.
  105. 6(c)(ii)3 marks· Chemistry Q6 6(c)(ii)Which sample, A or B, would require the LARGER volume of iodine? Explain your answer.
  106. 6(c)(iii)2 marks· Chemistry Q6 6(c)(iii)Suggest TWO benefits of using the pressure cooker in Method 3.
  107. 6(c)(iv)4 marks· Chemistry Q6 6(c)(iv)Explain how the pineapple functions in cooking the lamb in Method 2. How does this differ from the use of the pressure cooker in Method 3?
  108. 2(b)(i)2 marks· CSEC Chemistry · January 2002 · Paper 2Make a sketch of the graph in Figure 1 and on it draw the results for the decomposition of hydrogen peroxide at room temperature in the absence of manganese dioxide.
  109. 2(b)(ii)a)5 marks· CSEC Chemistry · January 2002 · Paper 2Considering Figure 1 and your answer to (b)(i), discuss the effect of temperature on the rate of production of oxygen, including energy profile diagrams where necessary.
  110. 2(b)(ii)b)5 marks· CSEC Chemistry · January 2002 · Paper 2Discuss the effect of manganese dioxide on the rate of production of oxygen, including energy profile diagrams where necessary.
  111. 2(b)(iii)2 marks· CSEC Chemistry · January 2002 · Paper 2How will the mass of manganese dioxide at the end of the reaction compare to that at the beginning of Experiment I? Give ONE reason for your response.
  112. 4(b)(i) [P2]2 marks· CSEC Chemistry · January 2002 · Paper 2Use data from the graph to determine the total volume of carbon dioxide evolved.
  113. 4(e) [P2]2 marks· CSEC Chemistry · January 2002 · Paper 2Explain why the graph has the shape shown.
  114. 4(f) [P2]2 marks· CSEC Chemistry · January 2002 · Paper 2Suppose that this experiment were to be repeated using calcium carbonate powder in place of marble chips, would you expect it to be completed in a shorter or longer time? Explain your answer.
  115. Q341 mark · multiple choice· CSEC Chemistry · January 2017 · Paper 1The rate of a chemical reaction does NOT depend on the
  116. Q191 mark · multiple choice· CSEC Chemistry · January 2018 · Paper 1A piece of metal is reacted with an acid to produce hydrogen gas. Which of the following procedures should be employed in order to increase the rate of the reaction? I. Increasing the temperature at which the reaction…
  117. Q291 mark · multiple choice· CSEC Chemistry · January 2018 · Paper 1The rate of a chemical reaction does NOT depend on the
  118. Q81 mark · multiple choice· CSEC Chemistry · January 2019 · Paper 1When 100\text{ cm}^3 of 2\text{ mol dm}^{-3} hydrochloric acid (in excess) are added to 5.0\text{ g} of granulated zinc, hydrogen gas is evolved at a certain rate. If 5.0\text{ g} of powdered zinc were used…
  119. Q251 mark · multiple choice· CSEC Chemistry · January 2019 · Paper 1A catalyst increases the rate of a reaction because it
  120. Q331 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1A piece of metal is reacted with an acid to produce hydrogen gas. Which of the following procedures should be employed in order to increase the rate of the reaction? I. Increasing the temperature at which the reaction…
  121. Q341 mark · multiple choice· CSEC Chemistry · May/June 2010 · Paper 1Item 34 refers to the graph below which shows the rate of reaction for different particle sizes of the same mass of magnesium, reacting with dilute acid. Which line on the graph, I, II, III or IV, would BEST represent…
  122. Q321 mark · multiple choice· CSEC Chemistry · May/June 2011 · Paper 1Which of the following statements BEST characterises a catalyst?
  123. Q461 mark · multiple choice· CSEC Chemistry · May/June 2011 · Paper 1Which of the following substances is the catalyst used in the manufacture of sulphuric acid by the contact process?
  124. Q311 mark · multiple choice· CSEC Chemistry · May/June 2013 · Paper 1Which of the following statements BEST describes a catalyst?
  125. Q321 mark · multiple choice· CSEC Chemistry · May/June 2013 · Paper 1An excess of magnesium powder was added to 50\text{ cm}^3 of dilute sulfuric acid, and the reaction was allowed to continue until no more hydrogen evolved. Which of the following graphs BEST represents the complete…
  126. Q281 mark · multiple choice· CSEC Chemistry · May/June 2015 · Paper 1Which of the following factors will usually increase the rate of catalytic decomposition of hydrogen peroxide?
  127. Q61 mark · multiple choice· CSEC Chemistry · May/June 2017 · Paper 1Some calcium carbonate was reacted with excess dilute hydrochloric acid. The volume of carbon dioxide evolved was recorded and plotted against time. Which of the following graphs represents the reaction?
  128. Q221 mark · multiple choice· CSEC Chemistry · May/June 2017 · Paper 1A piece of metal is reacted with an acid to produce hydrogen gas. Which of the following procedures should be employed in order to increase the rate of the reaction? I. Increasing the temperature at which the reaction…

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