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CAPE Chemistry Unit 1 · 2009 · Paper 2

42 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

Practise this paper
  1. 1(a)(i)1 markState the property of elements which is responsible for the characteristic line spectrum of each element.
  2. 1(a)(ii)3 marksSketch a diagram of the line emission spectrum of hydrogen. On your diagram, indicate the direction of increasing frequency and increasing wavelength.
  3. 1(a)(iii)4 marksExplain, in terms of electronic transitions, the origin of the lines in the Balmer series.
  4. 1(a)(iv)1 markState the region of the electromagnetic spectrum in which the lines in the Balmer series occur.
  5. 1(a)(v)2 marksCalculate the energy (E) of a quantum of radiation with a corresponding frequency (v) of 4.57 x 10^14 Hz. (h = 4 x 10^-13 kJ s mol^-1)
  6. 1(b)4 marksIdentify FOUR errors in the assembly of the apparatus in Figure 1.
  7. 2(a)2 marksState TWO factors which affect reaction rates.
  8. 2(b)(i)2 marksComplete Table 1 by writing the missing values for 1/[NO2].
  9. 2(b)(ii)2 marksPlot a graph of 1/[NO2] against time, on the grid below. The first and last points have been plotted on the grid.
  10. 2(b)(iii)2 marksFrom your graph, determine the order of the reaction with respect to NO2. Give a reason for your answer.
  11. 2(b)(iv)1 markState the rate law for the reaction.
  12. 2(b)(v)2 marksUse the slope of the graph to determine the value and units of the rate constant, k, for the reaction.
  13. 2(c)2 marksSeveral experimental methods, including titrimetry, can be used to determine reaction rates. Suggest TWO OTHER methods which can be used to determine reaction rates.
  14. 2(d)2 marksOutline TWO experimental steps in the determination of the reaction rate of an esterification reaction using titrimetry.
  15. 3(a)5 marksInsert arrows in the relevant boxes in Figure 2 to show the electronic configuration of the species.
  16. 3(b)2 marksUse the distribution in the d-orbitals to account for colour in transition metal ions.
  17. 3(c)2 marksAccount for the observation that Zn2+ compounds are normally colourless.
  18. 3(d)(i)5 marksComplete the table below by writing the colour of the species labelled A, B, C, D and E in Figure 3.
  19. 3(d)(ii)1 markWrite the formula of Species E.
  20. 4(a)1 markState the basic principle behind the VSEPR theory.
  21. 4(b)(i)2 marksUsing the VSEPR theory, state the shapes of the hydroxonium (H3O+) and ammonium (NH4+) ions.
  22. 4(b)(ii)2 marksUsing suitable diagrams, illustrate the shape of EACH ion in (b) (i).
  23. 4(b)(iii)4 marksAccount for the shape of EACH of the species, H3O+ and NH4+.
  24. 4(c)(i)4 marksThe experimental determination of the relative molecular mass of ethanoic acid (CH3CO2H) produces a value of 120 g. Your answer should include a suitable diagram.
  25. 4(c)(ii)2 marksThe boiling point of propanone (acetone) is greater than the boiling point of butane.
  26. 5(a)2 marksState Le Chatelier's Principle.
  27. 5(b)(i)2 marksState the effect of EACH of the following on the equilibrium position of the reaction in Equation 1: An increase in pressure
  28. 5(b)(ii)2 marksState the effect of EACH of the following on the equilibrium position of the reaction in Equation 1: An increase in temperature
  29. 5(c)(i)4 marksWhen SO2 and O2 are mixed in a 2 : 1 ratio at 303 K the total equilibrium pressure of the system is 101.3 kPa. Calculate Kp at 303 K for the reaction in Equation 1, if at equilibrium the number of moles of SO2, O2 and…
  30. 5(c)(ii)1 markComment on the value for Kp at 695 K for the reaction in Equation 1.
  31. 5(d)(i)1 markDefine the term 'Brönsted - Lowry base'.
  32. 5(d)(ii)2 marksIdentify TWO bases in Equation 2.
  33. 5(e)3 marksCalculate the pH of a 0.05 mol dm-3 solution of Ba(OH)2.
  34. 6(a)1 markDefine the term 'electronegativity'.
  35. 6(b)(i)2 marksDescribe the structures of the chlorides.
  36. 6(b)(ii)2 marksDescribe the differences in the pH of the solutions formed when the chlorides react with water.
  37. 6(b)(iii)2 marksWrite the equation for the reaction of silicon(IV) chloride and water.
  38. 6(c)(i)1 markWhat is meant by the term 'disproportionation'?
  39. 6(c)(ii)2 marksA suspension is formed when excess silver ions (Ag+) are added to Solution P. On filtering the suspension and heating the filtrate a white precipitate is formed. Given the fact that the filtrate contains both Ag+ and…
  40. 6(d)(i)3 marksIdentify the substances, T, U and V.
  41. 6(d)(ii)1 markWrite the formula for the ion present in S.
  42. 6(d)(iii)1 markWrite the equation for the formation of the cream precipitate, V.

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