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Summary Polaris Chemistry 3 Vwo

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A snapshot of the summary - Polaris chemistry 3 vwo

  • 1 Substances

  • 1.1 Chemistry and practicals

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  • Safety rules when doing an experiment
    You must always wear safety glasses and a lab coat, you must also  have your hair tied
  • What does a fume cupboard have as function
    Dangerous fumes are extracted so you cannot inhale them
  • What do a fire blanket and fire extinguisher do
    They put fire out if someone cathed fire on their clothes
  • What do you have to do when you come in contact with corrosive or toxic substances
    You have to wash them away with the emergency shower
  • What do you have to do when you get a corrosive or toxic substance in your eyes
    You have to use the safety eye wash
  • 1.3 Seperating mixtures 1

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  • How can you identify a homogenous mixture
    Every molecule of one substance is surrounded by molecules of the other substance
  • How can you identify a heterogenous mixture
    There are seperate groups of molecules of at least one of the substances in the mixture
  • 1.5 Calculating with mixtures

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  • How is the concentration expressed
    Grams of dissolved substance per litre or mililitre of solvent
  • Calculation of the volume/ mass percentage
    Volume or mass of substance/ volume or mass of mixture* 100%
  • Threshold limit values
    Indicates the maximum amount of a substance per m3 of air in a room without endangering health

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