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A simple dilution problem.

  1. Sep 12, 2009 #1
    This problem seems simple enough, yet my professor says my answer is incorrect. Here is the problem.

    1 ml of a 0.10 M solution of HCL is added to 21 ml of distilled water. What is the final concentration of the solution (M)?

    Im going to use the equation


    Where C1 is the initial concentration (M) and C2 is the final Concentration, and V1 is initial Volume, and V2 is final volume

    If I add 1ml of HCl to 21ml of H2O, I will have 22ml of solution. This is V2, therefore



    C2= 0.0045 M

    What am I overlooking?

    Thanks in advance.
  2. jcsd
  3. Sep 12, 2009 #2


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    Science Advisor
    2017 Award

    Looks good to me.
  4. Sep 13, 2009 #3


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    Staff: Mentor

    Perhaps s/he is nitpicking on the significant figures.

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