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Topic: Boiling points of different saline solutions  (Read 2278 times)

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Offline cormar

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Boiling points of different saline solutions
« on: December 30, 2015, 10:10:07 AM »
Hey guys :)
Through an experiment I measured the different boiling temperatures of 6 different salt solutions (NaCl, LiCl, CaCl2, KCl, MgCl2, BaCl2) all of which had the concentration 0.2mol / 100ml. I found that some of these solutions (CaCl2, MgCl2, BaCl2) have a higher boiling point than the others (although there could be deviations due to unexact measurements). I know that salts in general elevate the boiling point of water but I cannot find an explanation why some salts elevate it more than others and what factors influence this.
In the interent I could not find anything helpful so it would be great if someone could explain this to me :)
Thank you in advance,
Cormar  ;)

Offline Borek

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Re: Boiling points of different saline solutions
« Reply #1 on: December 30, 2015, 11:32:07 AM »
The most obvious page, which was the first I visited:

https://en.wikipedia.org/wiki/Boiling-point_elevation

explains what is going on and why.

Your observation - the one about these particular three salts having a higher boiling point than the three other - is quite correct and exactly as expected. Actually the wikipedia article mentions some of the salts you used.
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