C2- how much?

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PRACTICE ALL MATHS METHODS ON PAPER

reversible reactions

  • if the products of a chemical reaction can react to produce the reactants then the reaction is reversible
  • (http://www.revisescience.co.uk/2011/schools/sspp/..%5C..%5Cimages%5Creversible.jpg) this is the sign used
  • eg ammonium chloride(http://www.revisescience.co.uk/2011/schools/sspp/..%5C..%5Cimages%5Creversible.jpg)ammonia+ chlorine

analysing substances

  • substances added to food to enhance their qualities are called adatives they may be natural or synthetic
  • food can be checked by chemical analysis to ensure only safe, permitted addatives are used
  • these methods can be paper chromotography and mass spectrometry
  • in paper chromotography a colour is…

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