Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Mass of polysaccharides

  1. Nov 6, 2017 #1
    Hey guys. When a polysaccharide (e.g. starch) is made I understand that monosaccharides are linked together and a water molecule is removed. In the final product the polysaccharide has a mass of n times its empirical formula plus a water molecule. Like the mass of 300 starches from 300 glucose molecules is 300(C6H10O5) + H2O. Why is this?
     
  2. jcsd
  3. Nov 6, 2017 #2

    DoItForYourself

    User Avatar
    Gold Member

    I think you mean why a starch molecule from 300 glucose molecules is 300(C6H10O5) + H2O.

    Because the water from each molecule has already been subtracted [the molecule of monomer was initially (C6H12O6)]. You must add one water molecule because the polymer has an -OH in the one end and -H in the other end.
     
  4. Nov 7, 2017 #3

    Borek

    User Avatar

    Staff: Mentor

    It is all in the structure - just count the atoms:

    starch.png
     
  5. Nov 7, 2017 #4
    Thanks guys you were extremely helpful!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Mass of polysaccharides
  1. Mass of a substance (Replies: 1)

  2. Mass of a subsample. (Replies: 1)

Loading...