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Homework Help: Concentration of substance

  1. Sep 30, 2012 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    Please see the attached,this is the last question of my chemistry homework but I can't figure it out.And sorry for that I can't type any attempt at a solution because I don't understand what it is asking for.And something appears in the question like V2-2(V1) confused me.Hope someone can help or explain the question to me,thx.
    Note that unit of concentration is gdm^-3

    Attached Files:

    • chem.jpg
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  2. jcsd
  3. Sep 30, 2012 #2


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    Staff: Mentor

    V1 and V2 are volumes of the titrant, as described in the upper part of text. V2-2V1 is just a number calculated using known volumes V1 and V2.
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