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Chemical Formulae for household items - Ratio

Discussion in 'Mathematics' started by tango78, Dec 15, 2011.

  1. tango78

    tango78 New commenter

    Hi,
    Does anyone have a list of chemical formulae for household items? I am looking to use them to teach ratio to my KS3 pupils. Any help would be appreciated.
    Thanks
     
  2. I think I'd stick to cake, concrete and paint mixes.

    What sort of household items do you mean?
     
  3. tango78

    tango78 New commenter

    :) True!

    I was thinking bleach and nail varnish remover and alcohol, stuff they will have come across before...
     
  4. BillyBobJoe

    BillyBobJoe Established commenter

    As I recall, the various sugars are multiples of C6 H12 O6 (glucose), gas is methane, CH4. I suggest wikipedia as a good source.
     
  5. Anonymous

    Anonymous New commenter

    I think that's a great idea but....
    You're assuming they understand formula, atoms and molecules! I was surprised by the lack of understanding of chemical structure and the names of elements when I have been tutoring KS3 and KS4 students. I'm sure I had been taught all that for my O-level when I was 14.
    Have fun.
    But don't tread on the chemists' toes.
     
  6. Methane (natural gas) CH4
    Water H20
    Hydrogen peroxide (bleach) HOOH
    Alcohol H5C2OH
    Octane (petrol) H18C8
    Glucose C6H12O6
    Sucrose (sugar) C12H22O11
    Caffeine (in coffee) C8H10N4O2
    Bicarbs of soda NaHCO3
    Acetic acid (vinegar) CH3COOH
    Glass
    65% sand (Si02) 13% sodium carbonate (Na2CO3) 12% limestone (CaCO3)
    (That's a difficult one)


     
  7. tango78

    tango78 New commenter

    Thanks everyone, especially for that list of them. You've all been really helpful. I'll talk to the Chem dept on Monday so that they don't get upset with us!

    Thanks
     

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