Edexcel Jun 2016 Paper 2 Q14

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14 (a) The rates of hydrolysis of three bromoalkanes are compared. 2 cm3 of ethanol is added to three test tubes, A, B and C. Three drops of bromoalkane are added to each of these three test tubes. 1-bromobutane is added to test tube A. 2-bromobutane is added to test tube B. 2-bromo-2-methylpropane is added to test tube C. 2 cm3 of hot aqueous silver nitrate solution is added to each test tube. (i) Explain why ethanol is added to each test tube. (1) D O N O T W R I T E I N T H I S A R E A(ii) Complete the general equation for the hydrolysis of these bromoalkanes. State symbols are not required. C4H9Br + H2O (cid:111) (iii) Eventually a precipitate is formed in each test tube. Give the colour of the precipitate formed and write the ionic equation, with state symbols, for its formation. (1) (2) ColourIonic Equation 12 *P46658A01224* 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 /> (iv) Identify the reagent you could add to dissolve the precipitate. (1)(v) Give the order in which the precipitates form in the test tubes A, B and C, giving the fastest first. (1)*(vi) State how the rates of hydrolysis depend on the structure of the bromoalkane. Suggest a reason for this difference. You are not required to give detailed mechanisms for the reactions. (2)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 *P46658A01324* 13 Turn over<br /> (b) (i) When 1-bromobutane reacts with an alcoholic solution of sodium hydroxide, a different reaction occurs. Draw a fully labelled diagram to show the apparatus needed for carrying out this reaction in the laboratory and collecting the gaseous organic product. (2) 14 *P46658A01424* 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) Name the organic product for this reaction and draw its skeletal formula. (2) NameSkeletal formula (c) 1-bromobutane reacts with alcoholic ammonia when heated under pressure. (i) State the type and mechanism of this reaction. (2) Type Mechanism(ii) Name the organic product of this reaction. (1)(Total for Question 14 = 15 marks) 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 *P46658A01524* 15 Turn over<br />

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