AQA Jun 2013 Paper 2 Q1

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section a answer all questions in the spaces provided do not write outside the box sulfuric acid is manufactured by the contact process a in this process sulfur dioxide reacts with oxygen the equation for the equilibrium that is established is so g o g so g h kj mol a i state and explain the effect of a decrease in temperature on the equilibrium yield of so effect of a decrease in temperature on yield explanation marks extra space a ii give two features of a reaction at equilibrium feature feature marks question continues on the next page turn over wmp jun chem b write an equation for the reaction of concentrated sulfuric acid with potassium bromide to form potassium hydrogensulfate and hydrogen bromide do not write outside the box mark c bromine is one of the products formed when concentrated sulfuric acid reacts with hydrogen bromide write an equation for this reaction state the role of sulfuric acid in this reaction equation role of sulfuric acid marks d concentrated sulfuric acid is used in a two stage process to convert methylpropene into methylpropan ol stage ch c ch h so ch c oso oh ch stage ch c oso oh ch h o ch c oh ch h so d i name and outline a mechanism for stage of this conversion name of mechanism mechanism marks wmp jun chem d ii deduce the type of reaction in stage of this conversion mark d iii state the overall role of sulfuric acid in this conversion mark do not write outside the box turn over for the next question turn over wmp jun chem

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