AS Level Chemistry - 14.2 Alkenes

Save hours of planning with my purpose made premium teaching resources —designed by an experienced educator who understand what really works.

All powerpoints are designed to fully cover the criteria within the up to date syllabus for the subject and help you engage students instantly while maintaining rigorous academic standards.
Perfect for in-person, hybrid, or fully online learning, our resources are customizable, curriculum-aligned, and built to boost student confidence and results. Stop spending late nights creating materials from scratch and start focusing on what matters most — inspiring your students.

This powerpoint contains a starter, 5 topic related Activities, 3 ipad Activities, revision questions, a mark scheme, and a plenary. All the content is differentiated and scaffolded to be suitable for EAL students.

This powerpoint is purposefully made for AS Level Chemstry using the most recent Cambridge syllabus.

It fully covers - 14.2 Alkenes

Learning outcomes
Candidates should be able to:

1. recall the reactions (including reagents and conditions) by which alkenes can be produced:
   (a) elimination of HX from a halogenoalkane by ethanolic NaOH and heat
   (b) dehydration of an alcohol, by using a heated catalyst (e.g. Al 2O3) or a concentrated acid (e.g. concentrated H2SO4)
   © cracking of a longer chain alkane

2. describe the following reactions of alkenes:
   (a) the electrophilic addition of
   (i) hydrogen in a hydrogenation reaction, H2(g) and Pt/Ni catalyst and heat
   (ii) steam, H2O(g) and H3PO4 catalyst
   (iii) a hydrogen halide, HX(g), at room temperature
   (iv) a halogen, X2
   (b) the oxidation by cold dilute acidified KMnO4 to form the diol
   © the oxidation by hot concentrated acidified KMnO4 leading to the cleavage of the carbon–carbon double bond and the identities of the subsequent products to determine the position of alkene linkages in larger molecules
   (d) addition polymerisation exemplified by the reactions of ethene and propene

3. describe the use of aqueous bromine to show the presence of a C=C bond

4. describe the mechanism of electrophilic addition in alkenes, using bromine/ethene and hydrogen bromide/propene as examples

5. describe and explain the inductive effects of alkyl groups on the stability of primary, secondary and tertiary cations formed during electrophilic addition (this should be used to explain Markovnikov addition)