• Funniest Story on the Job Contest Starts Now!

    Contest starts now and ends September 27th. Winner will receive a special user banner and $10 Amazon Gift card!

    JOIN NOW
  • Site Updates Coming Next Week

    Site updates are coming next week on Monday and Friday. Click the button below to learn more!

    LEARN MORE

DAT Destroyer Ochem #6 2017

orgoman22

DAT DESTROYER
Sponsor
Vendor
15+ Year Member
Mar 12, 2005
4,577
3,362
346
New York City
www.orgoman.com
  1. Non-Student
I understand why the answer is D but was curious about the explanation for why B is incorrect. Answer choice B says that Ethanol/H20 @ ph=10 is not miscible. Why? @orgoman22
Think back when you did an extraction in college. You needed 2 phases.....an organic phase....which was the ether.......you then added either AQUEOUS acid or base, to complete your procedure. If you had water and ethanol......only one phase would be present. Say you dissolved benzene, toluene , benzoic acid, and aniline in ether.........you would then add aqueous KOH for example.....this would react with the benzoic acid and create the aqueous layer.. sodium benzoate would be produced......which if you recall.....would be a distinct layer in the separatory funnel.

Hope this helps.

Dr. Romano
 
This thread is more than 4 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.