Fluids, Electrolytes, Acid-Base
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General Concepts
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< Osmolality vs osmolarity
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Osmolality
[H 20)
Milliosmoles per kg of water. The osmolality is the number of
(mOsm/a€nKg solute osmoles (number of particles that contribute to an os-
motic pressure) in solution. For a fully dissociated salt, like [NaCI, the osmolality of 1 mole of salt is 1 Osm of Na +1 Osm
of CI = 2 Osms.
Osmolarity (mOsm/â€OL
[H 20)
Milliosmoles per liter of water. At room temprature, 1L = 1 kg
water, therefore, this is equal to osmolality, but, since the density of water changes with temprature, this measure is tempra-ture dependent. However, for small solute concentrations, it can be assumed the two are equal.
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ARMYMED
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· 2 years ago
