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Color change Chemical reaction help

  1. Dec 7, 2011 #1
    I am working on a project that needs 2 chemicals to react and change colors. The catch is they most likely need to be or come in a powder form, non toxic, and relatively inexpensive.

    PLEASE HELP!!!!
     
  2. jcsd
  3. Dec 7, 2011 #2

    Borek

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    Staff: Mentor

    To clarify: you want to mix two powders and observe color change?
     
  4. Dec 7, 2011 #3
    yes, that is correct
     
  5. Dec 7, 2011 #4
    ....without heat
     
  6. Dec 7, 2011 #5

    chemisttree

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    Science Advisor
    Homework Helper
    Gold Member

    Try tumeric and methylene blue. Mix the yellow powder with the blue one and it turns green! How cool is that?
     
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