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Osmolarity

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highachiever:
hi!

does anyone know what the osmolarity (mosmol/l) of 100 mM (mmol/l) d-mannitol and 50 mM dimethyl sulfoxide is?
ive already figured that 150 mM of nacl is 300mosmol/l.

merci & best regards

- r

Borek:
If you have calculated osmolality for NaCl solution, can't you apply the same approach to the substances in question?

highachiever:
that's my problem.
wikipedia says cacl's osmorality is twice as high as its morality.
but then i came across another forum post that says that na2so4 osmorality is three times higher than morality because of its dissolution in water .
in addition, d-mannitol and dimethyl sulfoxide are much more complex ...

Borek:

--- Quote from: highachiever on August 04, 2021, 08:04:07 AM ---wikipedia says cacl's osmorality is twice as high as its morality.
--- End quote ---

CaCl? No such compounds, If you mean CaCl2 it should be thrice. It depends on the dissociation and van 't Hoff factor.


--- Quote ---in addition, d-mannitol and dimethyl sulfoxide are much more complex ...

--- End quote ---

Actually they are much simpler in the context.

highachiever:
oh no i'm sorry I meant nacl from my previous message.

yes, i know that osmorality mainly depends on the dissociation of the molecules (i didn't have the van't hoff factor in school ...), but i don't seem to find it online ... how exactly can i find out the osmorality of both molecules?

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