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2 marksQualitative Analysis

CSEC Chemistry · January 2002 · Paper 2 · Question 2(c)

Describe how it can be confirmed that the gas produced in Experiment I is oxygen.

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  1. 2(a)Draw a fully labelled diagram of the apparatus that could have been used to carry out Experiment I.[4 marks]
  2. 2(b)(i)Make 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…[2 marks]
  3. 2(b)(ii)a)Considering 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…[5 marks]
  4. 2(b)(ii)b)Discuss the effect of manganese dioxide on the rate of production of oxygen, including energy profile diagrams where necessary.[5 marks]
  5. 2(b)(iii)How 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.[2 marks]
  6. 2(a) [P2]Complete Table 1 by filling in the missing values for Species, Atomic Number, Mass Number, Arrangement of Electrons, Number of Neutrons, Formula of Chloride,…[12 marks]
  7. 2(b) [P2]Illustrate, using an example, what you understand by the term 'isotope'.[3 marks]

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