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1 markQualitative Analysis

CSEC Chemistry · May/June 2008 · Paper 2 · Question 1(b)

A student performs tests on an aqueous solution of Compound X, recording observations in Table 2. The task is to complete Table 2 by providing inferences based on these observations.

Complete Table 2 by filling in the inferences that could be made based on the observations recorded.

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Other parts of this question

  1. 1(a)(i)a)What is meant by EACH of the following? pH scale[4 marks]
  2. 1(a)(i)b)What is meant by EACH of the following? The end point of an acid-base titration[4 marks]
  3. 1(a)(ii)Complete Table 1 below by recording the missing pH meter readings from Figure 1.[2 marks]
  4. 1(a)(iii)Using the graph paper provided on page 5 and the data in Table 1, plot a graph of pH against volume of sodium hydroxide added.[3 marks]
  5. 1(a)(iv)Use the graph to determine the volume of sodium hydroxide which reacts completely with the 20 cm³ of 0.005 mol dm⁻³ sulphuric acid.[1 mark]
  6. 1(a)(v)a)Calculate EACH of the following: The number of moles of sulphuric acid in 20 cm³ of the sulphuric acid used[2 marks]
  7. 1(a)(v)b)Calculate EACH of the following: The number of moles of sodium hydroxide in the volume of sodium hydroxide used in (a) (iv)[2 marks]
  8. 1(a)(v)c)Calculate EACH of the following: The number of moles of sodium hydroxide in 1 dm³ of this solution[1 mark]
  9. 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…[2 marks]
  10. 1(c) (diagram)Labelled diagram of apparatus to be used:[2 marks]

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