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Salt Climbs Out Of A Glass

With a time lapse camera you see the salt in the water climbs up and out of the glass as the water evaporates.

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15 Comments

Current View: 15 / Show all Comments

Violetninja420 : LVL 37: VP 4.5: said:

Violetninja420

14 votes NegativePositive

580 days 3 hours ago...

^Water evaporates and salt does not...

boldfart : LVL 38: VP 4.6: said:

boldfart

15 votes NegativePositive

580 days 3 hours ago...

Anybody got the explanation for this?

spyvsspy : LVL 42: VP 5: said:

spyvsspy

Hidden (Show Comment) -33 votes

579 days 21 hours ago...

sorry it just my jizz build up over time.

the fonz : LVL 33: VP 4.2: said:

the fonz

30 votes NegativePositive

579 days 8 hours ago...

^fail

Danielnator : LVL 38: VP 4.6: said:

Danielnator

1 votes NegativePositive

579 days 8 hours ago...

I dont think its climbing. I think its just condensing out of the vapor because when water dissolves Na Cl it simply does so by separating the two ions so my guess would be that it just condensating onto the cup when the water was escaping.

fish_and_rice : LVL 31: VP 4: said:

fish_and_rice

4 votes NegativePositive

579 days 7 hours ago...

^ I`m clueless but that sounds good to me.

Dweebster : LVL 6: VP 1.5: said:

Dweebster

4 votes NegativePositive

579 days 7 hours ago...

The water is super-saturated with salt, that`s why there is no much...
but, as the water evaporates, the vapor rises and the salt molecules probably stay with it for a time and forms crystals on the first thing it touches, obviously, the edge of the cup.

nastc1 : LVL 25: VP 3.4: said:

nastc1

2 votes NegativePositive

579 days 7 hours ago...

^Very good dweebster, I was about to say that same thing(in my own words)

DeltaSpartan : LVL 37: VP 4.5: said:

DeltaSpartan

2 votes NegativePositive

579 days 7 hours ago...

the water evaporates taking the salt up with it, but the salt doesn`t evaporates so it just falls back down. if the evaporating water it right over the middle, it falls back into the watter to try again, but if its over to one side it falls onto the glass and gets stuck.

ywn : LVL 30: VP 3.9: said:

ywn

-3 votes NegativePositive

579 days 7 hours ago...

... how would you super saturate water with salt cmon i didn`t know it was possible with salt and if so then why not just drop another grain of salt into it and watch it crystallize in an exothermic reaction which i find much more entertaining then watching it evaporate.. but thats just me

jarcaf : LVL 37: VP 4.5: said:

jarcaf

0 votes NegativePositive

579 days 7 hours ago...

just warm up the water and add more salt. it`ll dissolve more than at room temp

mnuzi : LVL 46: VP 5: said:

mnuzi

2 votes NegativePositive

579 days 6 hours ago...

Anyone with a salt water fish tank knows this happens. Not too special. Kinda a bitch to clean.

KMCS : LVL 34: VP 4.2: said:

KMCS

2 votes NegativePositive

579 days 6 hours ago...

What happens when you do this with a margarita glass?

ywn : LVL 30: VP 3.9: said:

ywn

0 votes NegativePositive

579 days 6 hours ago...

^^^ just saying i thought it only re solidified never tried that with salt.. and does it work the same as other supersaturated liquids .. where you add a seed and it crystallizes all kool like =]

Gambit Xe : LVL 39: VP 4.7: said:

Gambit Xe

2 votes NegativePositive

579 days 5 hours ago...

Lol, warming up the water will change the temperature of the solution. However, it is possible to supersaturate a salt solution, but if the solution was supersaturated, we would have seen a lattice network form on top of water long before the water evaporates. There is no way that the evaporating water could carry the salt upwards. While there is room for a dative bond on the oxygen atom of water, NaCl is too soluble. Even when we think about this logically, it can`t occur. Evaporation occurs when certain atoms of water gain enough potential energy to undergo a phase change. This essentially means that the intermolecular forces between the water molecules has lessened as the result of an external source. When water boils, the partial pressure of the liquid exceeds the atmospheric pressure, which explains why pressure cookers can increase the boiling point of water to much higher than 100 degrees celsius.
The reason that the salt seems to creep upwards is due to the nature of all ionic compounds. Salt, like other ionic compounds, form a lattice structure with a sea of delocalized electrons, which basically means that the electrons are free to move as they wish amongst the atoms. What`s happening is basically the establishment of this lattice structure. As the water evaporates, sodium ion and chloride attach to the lattice structure. But, due to this delocalization, and the shape of the structure of salt, it keeps adding to the lattice network. However, it seems that the water was probably cooled from a very hot temperature as opposed to just mixing salt into room temperature water and watching that water evaporate. It seems that there is consistent steam throughout, which would lead to the upward progression of the lattice. Had it been room temperature, this would not occur as significantly. Since salt has such a solubility in water, just think about a crowded stadium. When salt is in the solution, there is lots of room for it, as volume is a cubic function. When it loses the water, it is forced to the sides, which is area, a square function. This means that there`s less room for the salt, so the salt spreads outwards.

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