CIE Jun 2016 v2 Paper 4 Q3

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(a) 2-bromopropane can be used to synthesise methylethylamine and 2-methylpropylamine. PMT NH2 reaction 1 methylethylamine Br 2-bromopropane reaction 2 reaction 3 NH2 2-methylpropylamine (i) Draw the structure of the intermediate X in the box above. [1] (ii) Suggest reagents and conditions for reaction 1,reaction 2,reaction 3.[3] (b) (i) Write an equation showing why aqueous solutions of ethylamine are alkaline.[1] (ii) Compare the basicities of ethylamine and ammonia. Explain your answer.[2]UCLES 2016 9701/42/M/J/16<br /> PMT (c) Solutions containing mixtures of amines and their salts are buffer solutions. (i) Explain what is meant by the term buffer solution.[1] (ii) Write two equations to show how a solution containing a mixture of CH3NH2 and CH3NH3Cl acts as a buffer.[2] [Total: 10]UCLES 2016 9701/42/M/J/16 [Turn over<br />

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