How to Calculate Osmolarity
What is Osmolarity?
Calculates osmolarity (osmoles per liter) for solutions based on solute concentration and van't Hoff factor.
Formula
Osmolarity = i * M * 1000, where i is van't Hoff factor
Step-by-Step Guide
- 1Enter solute concentration in molarity
- 2Specify the van't Hoff factor for the solute
- 3Calculate total osmolarity of solution
Worked Examples
Input
0.3 M NaCl, i=1.86
Result
558 mOsm/L
Medical IV fluid concentration
Common Mistakes to Avoid
- ✕Using wrong van't Hoff factor for compounds
- ✕Confusing molarity with osmolarity
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