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    the isotonic concentration of glucose should be twice that of NaCl why?!!!
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    (Original post by rosegirl10)
    the isotonic concentration of glucose should be twice that of NaCl why?!!!
    Should really be in the Study Help section, but I'll bite.

    It's due to a difference in osmolarity (Osm/L), which takes into account the dissociation of a compound into its constituent ions. NaCl, dissociates into Na+ and Cl- when dissolving in water. Therefore, when 1M of NaCl dissolves in water, it has an osmolarity of 2M. Glucose cannot further dissociate in a solution. Thus, 1M of glucose has an osmolarity of 1M in water.
 
 
 
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