AQA Jun 2017 Paper 3 Q2

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Concentrated sulfuric acid reacts with alkenes, alcohols and sodium halides. 0 2 0 2 . 1 Name the mechanism for the reaction of concentrated sulfuric acid with an alkene. [1 mark] 0 2 . 2 Outline the mechanism for the reaction of concentrated sulfuric acid with propene to show the formation of the major product. [4 marks] 0 2 . 3 Draw the structure of the minor product of the reaction between concentrated sulfuric acid and propene. [1 mark] *06* IB/M/Jun17/7405/3<br /> 0 2 . 4 Explain why the product shown in your answer to Question 2.2 is the major product. [2 marks] 0 2 . 5 Butan-2-ol reacts with concentrated sulfuric acid to form a mixture of three isomeric alkenes. Two of the alkenes are stereoisomers. Draw the skeletal formula of each of the three isomeric alkenes formed by the reaction of butan-2-ol with concentrated sulfuric acid. Give the full IUPAC name of each isomer. [3 marks] Skeletal formula Name Turn overIB/M/Jun17/7405/3 *07*<br /> 0 2 . 6 A by-product of the reaction of butan-2-ol with concentrated sulfuric acid has the molecular formula C4H8O Name this by-product, identify the role of the sulfuric acid in its formation and suggest the name of a method that could be used to separate the products of this reaction. By-product Role of sulfuric acid Name of separation method 0 2 . 7 Concentrated sulfuric acid reacts with solid sodium chloride. Give the observation you would make in this reaction. State the role of the sulfuric acid. Observation with sodium chloride Role of sulfuric acid [3 marks] [2 marks] 19 0 2 . 8 Concentrated sulfuric acid reacts with solid sodium iodide, to produce several products. Observations made during this reaction include the formation of a black solid, a yellow solid and a gas with the smell of bad eggs. Identify the product responsible for each observation. [3 marks] Black solid Yellow solid Gas *08* IB/M/Jun17/7405/3<br />

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