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Homework Help: Titration chemistry problem

  1. Mar 3, 2013 #1
    Sorry to disturb. I'm really bad at chemistry and i was hopping i could find some help...
    My major doubt is about Titration for now and how to find what is asked even if i got the data needed.

    1. The problem statement, all variables and given/known data

    25.0 cm3 of 1.00 x 10-1 mol dm3 hypobromous acid ( HBrO ) solution is titrated with an aqueous solution of sodium hydroxide, NaOH(aq) with a concentration of 8.00 x10-2 mol dm-3

    2. Relevant equations

    Ka for hypobromous at 25º : 2.00 x 10-9
    pKw of water at 25ºC : 14.0

    3. The attempt at a solution

    1-Calculate the volume of sodium hydroxide that must be added to reach the equivalent point?

    2-Calculate the initial PH of the solution Hypobromous acid at 25º?

    3- Calculate the PH at the equivalence point of the titration at 25º?

    rather than the answers i would like someone to help me with which formulas i should use to solve it.

    Thx in advance.
  2. jcsd
  3. Mar 3, 2013 #2


    User Avatar

    Staff: Mentor

    You have nicely used the template to dodge the first homework rule of the site - you have to show your attempts at solving the question to receive help.

    Browse this site: http://www.titrations.info/ - it contains answers to all your questions (and more).
  4. Mar 3, 2013 #3
    I did not asked for the answers i just dont have my template with the formulas, therefore i dont know which ones to use
  5. Mar 3, 2013 #4


    User Avatar

    Staff: Mentor

    But you were taught some equations used to calculate pH, weren't you? You were also taught something about stoichiometry, about reaction balancing - these are the building blocks that are required to solve the problem.
  6. Mar 3, 2013 #5
    Chemistry is the only subject i really dislike in school but i have to do it, my media from 0-100 would be near 90 without chemistry, but it lowers it to 75.

    Therefore i decided that i would not take it to the final exams, but the teacher decided that based on this type of exercises he will do a last test.

    The exercise isnt even an homework, i found it in a school exercise book, but the method to solve it wasnt there and i havent got no idea how to do it. I pass the exame and im done with chemistry.
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