FACTOID # 60: Japan's water has a very high dissolved oxygen concentration - but not enough to prevent drowning in the bath.
 
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Encyclopedia > Osmolality

When substances are dissolved, the number of distinct particles in solution is measured as Osmolality.


This quantity is measured in osmoles, a non-SI unit, which is equal to the number of moles of osmotically active particles in the solution. In this calculation, salts are presumed to dissociate into their component ions. For example, a mole of glucose is one osmole, whereas a mole of sodium chloride is two osmoles (one mole of sodium and one mole of chloride). The International System of Units (abbreviated SI from the French language name Système International dUnités) is the modern form of the metric system. ... Glucose (Glc), a monosaccharide, is one of the most important carbohydrates. ... Flash point Non-flammable R/S statement R: none S: none RTECS number VZ4725000 Supplementary data page Structure and properties n, εr, etc. ... General Name, Symbol, Number sodium, Na, 11 Chemical series alkali metals Group, Period, Block 1, 3, s Appearance silvery white Atomic mass 22. ... The chloride ion is formed when the element chlorine picks up one electron to form the anion (negatively charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. ...


Osmolality is a measure of osmoles of solute per kilogram of solvent. The similar measurement osmolarity measures moles per liter of solvent. If the solvent is water, these measurements are practically equivalent. The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... A substance is soluble in a fluid if it dissolves in the fluid. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... A solvent is a liquid that dissolves a solid, liquid, or gaseous solute, resulting in a solution. ... The litre (or liter in US) is a metric unit of volume. ... Water (from the Old English word wæter; c. ...


See also

Plasma osmolality is the osmolality of human blood. ...

External links


  Results from FactBites:
 
Osmolality: The Test (1230 words)
The osmolality test is a snapshot of the number of solutes present in the plasma, urine, or stool.
Stool osmolality may sometimes be ordered to help evaluate chronic diarrhea that does not appear to be due to a bacterial or parasitic infection or to another identifiable cause such as intestinal inflammation or damage.
A plasma osmolality test and osmotic gap may be ordered when a patient has symptoms such as thirst, confusion, nausea, headache, lethargy, seizures, or coma that the doctor suspects may be due to hyponatremia or the ingestion of a toxin such as methanol or ethylene glycol.
Discovery Health :: Medical Tests :: urine osmolality test (446 words)
Osmolality also provides information about the body's ability to excrete certain materials (low excretion means kidney damage) and balance fluids like water (when someone drinks a lot of water, there is more in the urine and therefore a lower osmolality).
Osmolality is interpreted according to the body's water balance: when water is plentiful omolality should be low (minimum of about 60) and when it is not, osmolality is maximized (1200).
Inapproprite low osmolality is the abnormality most found and may be a sign of: • diabetes insipidus, a disease which causes increased thirst and urination as a result excess water loss in the urine.
  More results at FactBites »


 

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