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    ad4au's Avatar
    ad4au Posts: 3, Reputation: 1
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    #1

    Jul 29, 2010, 02:54 PM
    at 20 degrees Celsius, the water ionization is 6.8x10^-15. What is the h3o concen.
    Explain in words please!
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #2

    Jul 29, 2010, 05:26 PM

    In words? OK, no math.
    Water molecules dissociate into H3O+ and OH- ions. One of each: that means their concentrations are equal.
    Since Kw equals the product of their concentrations it can thus be expressed as the concentration of H3O+ squared.
    This means the H3O+ concentration equals the square root of Kw. This will be a little bigger than 8 x 10^-8.
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