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2 marksReactions of Carbon Compounds

CSEC Chemistry · January 2008 · Paper 2 · Question 1(c)(ii)

You are provided with three brands of beer (Carib, Banks, Red Stripe) and need to plan an investigation to determine which has the highest percentage alcohol content.

Description of the method to be used

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  1. 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…[7 marks]
  2. 1(a)(ii)Using the graph paper on page 5, plot the reciprocal of time against the concentration of KIO3.[5 marks]
  3. 1(a)(iii)Explain the shape of the graph.[2 marks]
  4. 1(b)Complete Table 2 below for tests carried out on the mixture labelled as Q.[3 marks]
  5. 1(c)(i)Apparatus and materials needed[2 marks]
  6. 1(c)(iii)ONE variable needed to be controlled[1 mark]
  7. 1(c)(iv)ONE precaution to be taken[1 mark]
  8. 1(c)(v)Expected results[2 marks]

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