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why salty solution have higher boiling points than the pure water (H2O) when the presence of impurities (salt) will weakened the covalent bond between the water molecules? should it be lower boiling points in salty water?

2007-12-30 17:37:12 · 5 answers · asked by refuzie 2 in Science & Mathematics Chemistry

sori... not the covalent bond- the hyydrogen bond..

2007-12-30 17:58:40 · update #1

Van't Hoff Factor?... never heard before.. thx, i'll look for this term..

2007-12-30 18:00:05 · update #2

the water tension is reduced with the presence of impurities... logic..

2007-12-30 18:01:57 · update #3

thanks guys....i've checked all the terms you guys listed... i got the idea bout the vant hoff factors. thanx to all. i wish that i could to rate all of u as the best answerer... thanx...

2008-01-01 13:19:03 · update #4

5 answers

chemistry actually,

it has a higher boiling point due to the Van't Hoff Factor

when the salt dissociates in water, the higher particle number will create a higher van't hoff factor, and that'll boost it's boiling point.

2007-12-30 17:49:39 · answer #1 · answered by Kai 2 · 1 0

The issue is what's happening at the surface of the boiling water and boiling salt water. Water must achieve enough energy and movement to move into a vapour and get past air molecules hovering just above the surface, exerting pressure, and trying to keep the energetic water atoms from making it past them.

Now add salt, which itself has a higher boiling point, and at the surface competes with and dilutes the number of energetic water molecules attempting to make their escape from the liquid water and past the air molecules so they can become water vapour. Add more salt, and the boiling point will go even higher.

Hope this helps.

2007-12-31 01:49:48 · answer #2 · answered by ░ SpiN ░ 2 · 1 0

First, there are no covalent bond between molecule of water but hydrogen bonds;
Secondly, the bonds between molecules of water are replaced by bonds between molecules of water and molecules of solute and this ries boiling point.
If you want more , look at the link

2007-12-31 01:49:27 · answer #3 · answered by maussy 7 · 1 0

Spin got it right. More specifically this is called 'colligative properties'.

2007-12-31 02:23:01 · answer #4 · answered by claytr0n 2 · 1 0

physics

2007-12-31 01:42:25 · answer #5 · answered by Anonymous · 0 2

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