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Homework Help: Oxygen saturation in a sample.

  1. Jan 27, 2010 #1
    1. The problem statement, all variables and given/known data

    Knowing that the vapour pressure of water at 25 C is 24 mm Hg, that the oxygen composition of air is 20% v/v and that the solubility of oxygen in water is 31.6 mL/L, demonstrate that the 100% O2 (oxygen) saturation is 0.75 umol (micromoles)

    2. Relevant equations

    pV=nRT ?

    3. The attempt at a solution

    I tried using pV=nRT taking into account the vapour pressure and getting a solution that was not 0.75 umol. I also attempted a ratio between the 31.6 mL/L as well as the density but I don't really know where to go from there.

    Any help at coming to the solution would be much appreciated!
  2. jcsd
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