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Chem question, homework due tomorrow

  1. Feb 28, 2007 #1
    1. The problem statement, all variables and given/known data
    Kk so the problem is that we have 55.48 ml of NaOH was required to titrate 25 mL of a weak monoprotic acid. After 31.64 mL of NaOH had been added, the pH is 4.96 for the solution. Calculate the Ka and pKa for this weak acid.

    2. Relevant equations
    pKa= pH + log(acid/conjugate base) maybe?

    3. The attempt at a solution
    I wanted to make the NaOh and acid a ratio and then since we know what pH is, just use the first equation but I don't think that'll be correct. Other than that I'm not sure how to approach this. Help will be aprreciated thanks
  2. jcsd
  3. Mar 1, 2007 #2


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    Not enough info. What is the concentration of NaOH?
  4. Mar 1, 2007 #3
    the concentration isn't given, I copied the exact problem.
  5. Mar 1, 2007 #4
    nevermind, i found out how to solve it
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