general noteds

• properties of a homologous series

  • similar chemical properties
  • same general formula
  • variations in physical properties
  • different by ch2
  • same functional group
• properties of poly ethene and uses

  • used in plastic bags and bottle as it's flexible unreactive and water proof
• properties of poly(chlorethene)

  • window frames and gutters - durable,long lasting,unreactive
  • used in cables as it is flexible and a good electrical insulator
• properties of poly(tetrafluroethene)

  • slipper nonstick and high melting point so it's used in pans
• hy does the rate of reaction decrease over time

  • fewer reacting particles left
  • fewer collision
  • fewer frequent collisions
• why must a ion have a unique test

  • test only detects that ion
  • no confusion without ions
• how can u see two ions are present in a sample

  • flame photometer
  • two sets of emissions