AS Level Chemistry - Unit 14.1 Alkanes

This Powerpoint specifically uses the Cambridge AS Level Chemistry Syllabus (9701) and covers all criteria for – Unit 14.1 Alkanes

Students will be able to -

1 recall the reactions (reagents and conditions) by which alkanes can be produced:
(a) addition of hydrogen to an alkene in a hydrogenation reaction, H2(g) and Pt/Ni catalyst and heat
(b) cracking of a longer chain alkane, heat with Al 2O3

2 describe:
(a) the complete and incomplete combustion of alkanes
(b) the free-radical substitution of alkanes by Cl 2 or Br2 in the presence of ultraviolet light, as exemplified by the reactions of ethane

3 describe the mechanism of free-radical substitution with reference to the initiation, propagation and termination steps

4 suggest how cracking can be used to obtain more useful alkanes and alkenes of lower Mr from heavier crude oil fractions

5 understand the general unreactivity of alkanes, including towards polar reagents in terms of the strength of the C–H bonds and their relative lack of polarity

6 recognise the environmental consequences of carbon monoxide, oxides of nitrogen and unburnt hydrocarbons arising from the combustion of alkanes in the internal combustion engine and of their catalytic removal

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a free pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
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