Alkenes

Chemistry of Alkenes
Organic Chemistry 
06 March 2024
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ChemistrySecondary EducationAge 12,13

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Chemistry of Alkenes
Organic Chemistry 
06 March 2024

Slide 1 - Tekstslide


  • create a quick slide presentation describing the cracking of long-chain hydrocarbons and the properties of alkenes
  • use the structural and displayed formulae of alkenes in describing its reactions with hydrogen, steam, and halogens
  • recognise the reason of cracking long-chain hydrocarbons into smaller and useful chains
Our Learning Goals

Slide 2 - Tekstslide

Chemistry of Alkenes
Organic Chemistry 
06 March 2024

Slide 3 - Tekstslide

What are alkenes?
  • unsaturated hydrocarbons
  • contain at least one carbon-carbon double bond (C=C)
  • form the homologous series 
  • general formula: CnH2n

Slide 4 - Tekstslide

Physical Properties of Alkenes
  • similar to that of alkanes
  • can exhibit isomerism

Slide 5 - Tekstslide

Reactivity of Alkenes
  • more reactive because they are unsaturated
  • C=C bond contains a σ bond and a π bond 

Slide 6 - Tekstslide

Chemistry of Alkenes
Organic Chemistry 
06 March 2024

Slide 7 - Tekstslide


  • Goal and Expected Output: Given your tasks, your team must create a reaction poster about alkenes. 
  • Standards : organisation, content, delivery, response to question
Collaborative Activity
timer
20:00

Slide 8 - Tekstslide


  • Team 1 - Catalytic cracking
  • Team 2 - Combustion of alkenes
  • Team 3 - Bromination (Ethene + Ethanolic Br2)
  • Team 4 - Bromination (Ethene + Aqueous Br2)
  • Team 5 - Hydrogenation
  • Team 6 - Catalytic addition of steam
REACTIONS

Slide 9 - Tekstslide

Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

Slide 10 - Tekstslide


  • Standing up while performing any reactions involving heating.
  • Be careful when heating the magnesium - do not look directly at the flame.
  • Wear eye protection throughout.
  • Silver nitrate solution is a moderate hazard and harmful to the aquatic environment. Waste from experiments using silver nitrate must not be poured down the drain.
  • Copper (II) sulfate is a moderate hazard and harmful to the aquatic environment. Waste from experiments using copper (II) sulfate must not be poured down the drain.
  • Copper (II) carbonate is harmful if swallowed, an irritant, and harmful to the aquatic environment. Waster from experiments using copper (II) carbonate must not be poured down the drain.
SAFETY ⚠️

Slide 11 - Tekstslide

Materials Checklist

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Which among the 5 experiments does not show a chemical change?
Experimental Question

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Write your team hypothesis or prediction.
Hypothesis

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Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

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Follow the steps on pages 71 and 72 of your practical workbook.
Experiment Proper

Slide 16 - Tekstslide


  • Standing up while performing any reactions involving heating.
  • Be careful when heating the magnesium - do not look directly at the flame.
  • Wear eye protection throughout.
  • Silver nitrate solution is a moderate hazard and harmful to the aquatic environment. Waste from experiments using silver nitrate must not be poured down the drain.
  • Copper (II) sulfate is a moderate hazard and harmful to the aquatic environment. Waste from experiments using copper (II) sulfate must not be poured down the drain.
  • Copper (II) carbonate is harmful if swallowed, an irritant, and harmful to the aquatic environment. Waster from experiments using copper (II) carbonate must not be poured down the drain.
SAFETY ⚠️

Slide 17 - Tekstslide


  • Wash the materials you used.
  • Clean your table.
  • Return the washed/ cleaned materials.
Clean-up
timer
7:00

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Prac 2.4 - Types of chemical reactions
Topic 6. Chemical Energetics 
04 March 2024

Slide 19 - Tekstslide


  • Share the results of your experiment.
  • What similarities and differences have you noticed?
Wrap-up

Slide 20 - Tekstslide