Question on mOsm...

[trailerpark]

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How many mOsm of Ca++ ions are there in 8.75 grams of anhydrous CaCl2?

Molecular wt of CaCl2 is 111

The answer is 79, I don't get it.

 

[Godslove]

mOsmol= (8.75g/L/111g/mole)x 1 x 1000= 78.8
Ca dissociates into 1 (just Ca), so you multiply by 1 and not 3 as in the case of CaCl2
Hope this helps

 

[trailerpark]

mOsmol= (8.75g/L/111g/mole)x 1 x 1000= 78.8
Ca dissociates into 1 (just Ca), so you multiply by 1 and not 3 as in the case of CaCl2
Hope this helps

Helps a lot! I was using just the molecular weight of Ca2+. I think I got confused with just the mOsm of just the Ca++. Thanks!