CAPE Chemistry Unit 2 · 2015 · Paper 2 · Question 5(a)
Explain how chromatography can be used to separate a mixture of dyes.
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- 5(b)(i)Explain how the presence of the components can be detected.[2 marks]
- 5(b)(ii)Calculate the Rf (retention factor) values of Q and R shown in Figure 1.[3 marks]
- 5(b)(iii)Suggest TWO reasons for the difference in the Rf values of R and Q.[2 marks]
- 5(c)Assess the methods of thin layer chromatography and column chromatography in relation to their uses.[4 marks]
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