Definition: Osmolarity approximately equals the sum of the molarities of
the particles in solution.

Examples:




a.   a 0.1 M glucose has an approximate osmolarity of 0.1 OsM.
b.   a 0.3 M KCl has an approximate osmolarity of 0.6 OsM because the KCl
will dissociate into 0.3 M K+ and 0.3 M Cl-.
c.   a 0.4 M MgCl2 has an approximate osmolarity of 1.2 OsM because the
MgCl2 will dissociate into 0.4 M Mg++   and 2*0.4 M Cl -.
d.   a solution containing 0.1 M glucose, 0.3 M KCl,=20and 0.4 M MgCl2 has an
approximate osmolarity of 1.9 OsM (0.1 + 0.6 + 1.2).




Carolyn Earley
Marketing Manager
Leica Microsystems
847-405-7014
Carolyn.Earley@Leica-Microsystems.com



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