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Homework Help: Chemisty question! aCids/bases!

  1. May 16, 2005 #1
    1.) i would like to know if this is right
    What is the reaction that occurs when calcium oxide is added to water?
    is it : CaO + H2o --> Ca(OH)2

    and the second question which i have no idea to is..

    Consider the buffer equilibrium:

    HF(aq) + H2O(l) ---> H30(aq) + F(negative)(aq)
    the HF has high conc.
    The H3O has low conc.
    and the F has high conc.
    Using le Chat's principle, what happens to the pH of the buffer solution when a small amount of NaOH is addeD?!
    thanks a bunch u guys!
  2. jcsd
  3. May 17, 2005 #2
    help.. :(
    anyone..specially the second question
  4. May 17, 2005 #3
    yikes, i also have another question... plz help.. :(

    What pH results when .75 mol of acetic acid is dissolve din enough water to make 3.0L of solution..?
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