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Homework Help: Determining new concentration?

  1. Apr 29, 2013 #1
    1. The problem statement, all variables and given/known data
    A solution 200mL solution has 1g/L of a solid dissolved in it. After boiling, there is only 136mL remaining. How much of the dissolved substance is left?

    I figured that if
    C1V1=C2V2, then if the concentrations were equal after calculation, i could the concentration after from the concentration before so that
    C2=(C1V1)/V2 thus converting the concentration to grams afterwards and subtracted that value from the previous one.
  2. jcsd
  3. Apr 30, 2013 #2


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    Staff: Mentor

    IMHO you are misinterpreting the question. You are not asked about a new concentration, but whether amount of dissolve solid changed.

    Did it? What was removed from the solution?
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