• Advice You're Thankful for Contest

    Now that it's getting close to Thanksgiving, we're running a contest to hear advice you've received that you're most thankful for! This can be any type of advice and the advice with the most reactions will win!

    JOIN CONTEST

Organic Solubility and BP

surfingbhudda

New Member
10+ Year Member
Mar 3, 2011
9
0
    AAMC 8 #123: They say fatty acid salts are partially water-soluble because of the carboxylate anion, but it's my understanding that the hydrophobic portion of the molecule would outweigh this greatly. Was anybody else really bothered by that question? In general, how do you go about figuring out what layer (polar or nonpolar) a certain molecule will be in during extractions?

    If you mix two liquids, one with a BP of say 50K and another of 60K, and when they are mixed, they interact favorably and give off heat, does that mean the BP can be elevated to above 60K? I know this affects vapor pressure, but not sure about boiling point.

    Thanks!
     

    MedPR

    Membership Revoked
    Removed
    Dec 1, 2011
    18,579
    52
    1. Pre-Podiatry
      AAMC 8 #123: They say fatty acid salts are partially water-soluble because of the carboxylate anion, but it's my understanding that the hydrophobic portion of the molecule would outweigh this greatly. Was anybody else really bothered by that question? In general, how do you go about figuring out what layer (polar or nonpolar) a certain molecule will be in during extractions?

      If you mix two liquids, one with a BP of say 50K and another of 60K, and when they are mixed, they interact favorably and give off heat, does that mean the BP can be elevated to above 60K? I know this affects vapor pressure, but not sure about boiling point.

      Thanks!

      You're right about fatty acids typically being hydrophobic. However, depending on your answer choices, a fatty acid salt could be the most water soluble of the available answers. If you have a short chain fatty acid salt, it will be more soluble than a long chain fatty acid salt.
       
      This thread is more than 9 years old.

      Your message may be considered spam for the following reasons:

      1. Your new thread title is very short, and likely is unhelpful.
      2. Your reply is very short and likely does not add anything to the thread.
      3. Your reply is very long and likely does not add anything to the thread.
      4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
      5. Your message is mostly quotes or spoilers.
      6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
      7. This thread is locked.