Ether and water questions

Discussion in 'DAT Discussions' started by shrister, May 19, 2014.

  1. SDN is made possible through member donations, sponsorships, and our volunteers. Learn about SDN's nonprofit mission.
  1. shrister

    shrister 2+ Year Member

    264
    79
    Apr 21, 2013
    DAT destroyer question 145 in chemistry section says that water and ether and miscible. If that's true, then why does water and ether form separate layers in aqueous extractions? From chads videos I wrote down water and ether are immiscible with ether being less dense and forms a layer above water. Can someone please clarify?

    Also, I take my test this Thursday (5/22) so if anyone has last minute advice, comments, or anything it would be greatly appreciated.
     
  2. SDN Members don't see this ad. About the ads.
  3. Thanhn

    Thanhn 2+ Year Member

    127
    83
    Nov 17, 2012
    Iowa
    I think it depends on the ether. Some ethers are completely soluble (THF) whereas others are not. In separation, you're mainly using diethyl ether, which is only slightly polar (the two ethyl groups make it less polar). Therefore, it's not completely soluble so it'll form its own layer in a separatory funnel.
     
  4. Dotoday

    Dotoday 7+ Year Member

    1,560
    87
    May 27, 2007
    If Ether has less than 4 carbons it is soluble in water. If it has more , like dipropyl ether, then water and ether will form two layers. So, it depends on the length of the ethers.
     
  5. SmileDesignersDDS

    SmileDesignersDDS

    199
    29
    Mar 22, 2014
    Water and ether ARE miscible especially lower weight ethers. Ethers dissolve in BOTH polar and nonpolar solvents.
     
  6. shrister

    shrister 2+ Year Member

    264
    79
    Apr 21, 2013
    Got it. Thanks!
     

Share This Page