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Homework Help: Lab question

  1. Oct 4, 2011 #1
    Hi, I have a problem regarding a lab question. It goes as follows:

    A student required .0500 M solution of hydrochloric acid, HCl, and has on hand a .5000 M solution. Calculate how much more of the concentrated solution, in mL units, must be pipetted if 400 mL of dilute solution are required, and a 500 mL volumetric flask is the only one available.

    Am I simply to use the M1 x V1 = M2 x V2 equation?

    Thank you
  2. jcsd
  3. Oct 5, 2011 #2


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    Staff: Mentor

    It will do. Beware - question is tricky. Not in terms of difficult calculations, more like a brain teaser.

    Please ask HW and HW type questions in homework & coursework forums.
  4. Oct 5, 2011 #3


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    Homework Helper
    Education Advisor
    Gold Member

    The student "requires" 400 ml. of the resulting dilute solution, but because he only has a 500 ml. volumetric flask, he may choose to prepare 500 ml. of the dilute solution.
  5. Oct 5, 2011 #4
    Thank you both. And I am sorry; I didn't know there was a separate form for homework questions, thank you for letting me know.
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