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Topic: Determine the osmolarity of 5* 10^-3 M Na3Po4  (Read 8610 times)

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Medical

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Determine the osmolarity of 5* 10^-3 M Na3Po4
« on: September 15, 2005, 10:59:24 AM »
hello guys!

i am stucked at this one. i hope you can help me out.

the question:

deremine the osmolarity of 5* 10^-3 M Na3Po4

we say that:
osmolarity =

3*5*10^-3 + 4*5*10^-3
OR
3*5*10^-3 +1*5*10^-3 + 4*5*10^-3

thank you
« Last Edit: September 16, 2005, 01:03:02 PM by Mitch »
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Offline xiankai

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Re:help please
« Reply #1 on: September 15, 2005, 08:46:44 PM »
the former seems more suitable.

why would there be an extra 1*5*10^-3 anyway...
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savoy7

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Re:help please
« Reply #2 on: September 15, 2005, 11:04:34 PM »
Let's see, Are you saying that Sodium Phosphate when dissolved in water will break up into Sodium, Phosphorous and Oxygen?

What do you think about it dissociating into sodium and phosphate ions?
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