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    hani123's Avatar
    hani123 Posts: 1, Reputation: 1
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    #1

    Sep 20, 2010, 09:06 AM
    How can we prove that a colorless liquid placed before us is pure water
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Sep 20, 2010, 09:31 AM

    What have you learnt about the properties of pure water?

    Pure water..

    What do you think can be used to test if the water is pure?
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #3

    Sep 20, 2010, 08:17 PM
    The adage "You can't prove a negative" is true.
    The best you could say is that any possible impurity is below the non-detect level.
    This will be expensive!
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