Ether and water questions

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

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  1. shrister

    shrister 2+ Year Member

    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.
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  3. Thanhn

    Thanhn 2+ Year Member

    Nov 17, 2012
    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

    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


    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

    Apr 21, 2013
    Got it. Thanks!

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