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Chemistry Revision

Dive into the world of chemistry with topics ranging from naming alkenes, isomerism mechanisms, polymer structures, intermolecular forces, to alcohol oxidation. The session includes mechanisms, identifying polymer forces and structures, and manipulating polymer properties.

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Chemistry Revision

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  1. Chemistry Revision Session 8

  2. Name this alkene And what about (CH3)2CHCHCH2? Naming Alkenes

  3. What type of isomerism is this? Why does it occur? Isomerism

  4. Mechanisms! • Explain how bromine reacts with ethene (4 marks) • Identify the mechanism type!

  5. Polymers • Draw a section of polymer chain to show the structure of poly(propene) • Draw a section of the polymer chain obtained from the monomer 1-chloroprop-1-ene! • Identify the intermolecular forces present in each polymer • Which would be more flexible? Why?

  6. More on IMF • Why does H2O have a higher boiling point than H2S? • Include a diagram in your answer for water!! • What is the shape of H2S?

  7. Test! • How can I differentiate between ethane and hex-3-ene in the laboratory?

  8. Sorry • Couldn’t resist ONE trick question- in the lab ethene will be a gas, where as, of course, hex-3-ene is a liquid. • The more sensible question to ask is how to differentiate between hex-3-ene and hexane! • Add bromine water- which will be decolourised by hex-3-ene (orange  colourless)

  9. Definitions • Explain the difference between thermosetting and thermoplastic ploymers • What is a co-polymer • What is the difference between a crystalline and a amorphous region of a polymer • How will this affect its properties?

  10. Manipulating polymers • Explain how each of the following will affect a polymers strength- • Adding a side group to the monomer- eg CH3 • Increasing the chain length of the polymer • Substituting a Cl atom for an H atom in the monomer • Substituting that Cl for an amine group

  11. Manipulating Polymers • Give 2 other ways I can increase the strength of a polymer • Again- boring though it may be- justify your answer!

  12. Manipulating polynmers • Cross-linking • Increasing stereo-regularity

  13. Alcohols

  14. Which is/are secondary alcohols and which is/are tertiary alcohols? • Name the product if I oxidise- • Name the functional group • State the reagents and conditions

  15. How would it be different if I oxidised ethanol using mild conditions? • And if I spent too long drinking coffee (surely not) and came back too late I would have made which compound?

  16. Dissolving Polymers • The polymer with the repeating unit shown below dissolves well in water. Why? • H OH ----C—C------ H H n

  17. Final definitions • Define the terms:- • Elimination • Electrophile

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