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Sugars Question.

  1. Aug 19, 2011 #1
    Hi.

    When glucose is dissolved into water it forms d-glucose where it is equilibrium with its alpha and beta glucose isomers since the end carbon can rotate. (yes?)

    Just wondering if it was possible that some of the middle carbons rotated and then some galactose was produced (since it differs only in the position of OH groups in the ring).

    Any thoughts?
     
  2. jcsd
  3. Aug 19, 2011 #2

    Borek

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    Staff: Mentor

    Carbon rotation is not enough to change one into another.
     
  4. Aug 19, 2011 #3
    Last edited by a moderator: May 5, 2017
  5. Aug 19, 2011 #4

    Borek

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    Staff: Mentor

    No, it is a chiral carbon.
     
  6. Aug 20, 2011 #5
    Okay, haven't come across that yet. But thanks.
    Another related question - in the reducing sugars test, using beddedicts solution, the reaction involves OH- ions, yet Bennidicts solution is CuSO4. Do the OH- ions come from the self ionisation of water?
    Thanks (im only in high school, so sorry if my questions seem basic (pun not intended))
     
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