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Homework Help: Stiochiometry (with solutions)

  1. Jul 11, 2009 #1
    1. The problem statement, all variables and given/known data

    Given the following reaction:

    H2SO4 + 2 NaOH ------>> Na2SO4 + 2 H2O

    If 43.2 mL of 0.236 M NaOH reacts with 36.7 mL of H2SO4 , what is the concentration of the H2SO4 solution?

    3. The attempt at a solution

    I am looking for the concentration of the H2SO4 solution

    My plan was...

    Volume of NaOH ---> moles NaOH ---> moles H2SO4 ----> concentration H2SO4

    But I am not getting the right answer, what am I doing wrong here?
  2. jcsd
  3. Jul 11, 2009 #2


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    Staff: Mentor

  4. Jul 12, 2009 #3
    Hi Borek.

    I just figured it out. My mistake was that to convert from moles H2SO4 to concentration H2SO4 I was dividing by the total amount of solution rather than the H2SO4 in the solution. Silly stuff, I need to be thinking more clearly.

    Thanks for that link. It's helpful.
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