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Quick question on separation

  1. Oct 23, 2008 #1
    when separating mixtures using only physical methods, does the order in which you separate them mater?

    for example, if i had had urea and napthalene in the mixture...both are water soluble...so to take the urea out i first take out the napthalene through sublimitation and then the urea through water solubility filtration (evaporation the water)...so if i hadn't taken the napthalene out first would that affect anything in the grand scheme of things?
  2. jcsd
  3. Oct 24, 2008 #2


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    Staff: Mentor

    Naphthalene is not water soluble.

    And yes - sometimes selecting correct order allows separation.
    Last edited: Oct 24, 2008
  4. Oct 24, 2008 #3


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    Science Advisor
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    I am not familiar with this method however my impression was that sublimation is relevant to a solid. How do you plan to collect the naphthalene? I am not certain if there are any concerns with boiling an aqueous solution of naphthalene since it has a freezing point of 80 C - 90 C.
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