This page contains the AQA A2 Chemistry C28 Amines Questions and kerboodle answers for revision and understanding.This page also contains the link to the notes and video for the revision of this topic.
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C28.1 Introduction to amines: Page No. 187
1 Secondary 2 Ethylpropylamine5 lt has the same value of Mr as ethylamine, which is a gas. 28.2 The properties of amines as bases: Page No. 189
1 a (CH3)2NH + HCl→ (CH3)2NH2++ Cl– b Dimethylammonium chloride 2 a It will dissolve, that is, the oily drops will disappear to give a colourless solution. b The oily drops will re-appear.3 Stronger, as it has two electron-releasing alkyl groups. 28.3 Amines as nucleophiles and their synthesis: Page No. 193
1 Because secondary and teniary amines (and quaternary ammonium salts) may be formed as well. 2 a b (C2H5)2NH; (C2H5)3N; (C2H5)4N+Cl– Banner 2Practice questions: Page No. 194-195
1 (a) Dimethylamine (b) ( Nucleophilic substitution (c) Quaternary ammonium salt- Surfactant / detergent / fabric softener or conditioner/ hair conditioner
- Sn or Fe/H2SO4
- OR H2/Ni can be used as the reducing agent
- R group increases electron density on N / has positive inductive effect
- Allow wrong amine in M1 but penalise in M3
- Allow C3H7 in M3
- Minus sign on NH3 loses M1 (but not M4 if NH3 also shown here)
- N-propylethanamide must be this name even if wrong amine used.