CAPE Chemistry Unit 2 · 2014 · Paper 2 · Question 1(b)(i)
The general formula for an aliphatic amine is RNH2.
Write the expression for the basic dissociation constant, Kb.
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Practise this questionOther parts of this question
- 1(a)(i)State the role of the UV radiation in the reaction.[1 mark]
- 1(a)(ii)Write equations to show the steps occurring in the propagation stage for the formation of dibromomethane from bromomethane.[2 marks]
- 1(b)(ii)The pKb values for ethylamine and phenylamine are 3.27 and 9.38 respectively. State which of these compounds is the stronger base.[1 mark]
- 1(b)(iii)State TWO reasons for the difference between the two pKb values in (b)(ii).[2 marks]
- 1(c)(i)Suggest a value for Kb for ethanamide, CH3CONH2.[1 mark]
- 1(c)(ii)State a reason for your answer in (c)(i).[1 mark]
- 1(d)Complete Table 1 by inserting the appropriate observations for tests (i) to (iv).[5 marks]
More practice: the rest of this paper · more Acidic and Basic Character of Organic Compounds questions · all CAPE Chemistry Unit 2 past papers