How to differentiate osmolarity and osmolality?
Answer:
1. Osmolarity
Osmolarity is the concentration of a substance in solution and is expressed as moles of solute per liter of the solution. Thus, a 0.1 molar (abbreviated 0.1 M) solution of sodium chloride contains 5.8443 (58.443 × 0.1) grams of NaCl per liter of solution.
2. Osmolality
Osmolality, a term less frequently used than molarity, is the number of moles of solute in 1000 grams of solvent. Thus, a 0.1 molal solution of sodium chloride in water has 5.8443 grams of NaCl in 1000 grams of H2O.
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