Edexcel Jan 2016 (IAL) Paper 6 Q4

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4 Steam distillation is one method used to separate organic compounds from mixtures. Some information about nitrobenzene is summarised in the table below. Molecular formula Appearance Density Boiling temperature Solubility in water C6H5NO2 Oily yellow liquid 1.20 g cm3 211(cid:113)C 0.19 g / 100 g of water at 20(cid:113)C (a) The diagram below shows a steam distillation apparatus used to extract nitrobenzene from a reaction mixture. water out HEAT HEAT water in (i) Identify substance A. (1)12 *P46942A01216* D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A<br /> (ii) Explain the purpose of the part of the apparatus labelled B. (1)(iii) On the diagram below, draw and label the contents of the receiver at the end of the steam distillation. (b) The nitrobenzene may be further purified by simple distillation. Describe the steps needed before the product of steam distillation can be further distilled. Any apparatus or chemicals needed for these steps should be named but practical details are not required. (2) (3)A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D *P46942A01316* 13 Turn over<br /> (c) A bottle of nitrobenzene has the hazard labels shown below. Symbol Meaning (i) Complete the table above with the meaning of each symbol. (ii) Suggest one change or addition to the apparatus in part (a) that would reduce the risk from both these hazards. D O N O T W R I T E I N T H I S A R E A (1) (1)(Total for Question 4 = 9 marks) TOTAL FOR PAPER = 50 MARKS 14 *P46942A01416* D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A<br />

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