How Does Salt Melt Ice?
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- Опубликовано: 8 фев 2025
- This week Reactions is look at the science behind rock salt and how it melts ice. We're breaking down the chemistry that keeps the roads safe when bad weather hits.
Special thanks to Pedro Alvarez, Ph.D., P.E. of Rice University for his help with this episode.
Check out his story at: www.alvarez.ric...
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Words and Video: Kirk Zamieroski
Scientific Consultant: Pedro Alvarez, Ph.D.
This video fails to mention a crucial point. The salt isn't just dissolving into solid ice. Rather, there's a film of water on the ice, in equilibrium with the ice, and THAT's what the salt is dissolving in, which prevents the water from re-freezing into ice. I'm guessing that's (at least partly) why salt doesn't work at cold enough temps: this film of water is no longer present.
I live in northern Sweden, we use salt in cold temperatures. (Not on roads since that would be very problematic with our climate). And it still works fine.
facts
I think what was the whole point of the video. It doesn't work in cold enough temps because even saltwater will freeze solid at low enough temps.
Best video on salt i've seen yet. Good Job !
Thank you very much. i was doing my science fair project about different solutions that help unfreeze water and you really helped.
Wow… in Dallas I was doubting pool salt over this cold weather freeze we just got lol and it worked!
Totally using this for my project ! This is awesome!
same im using this for my project too lol
Same. Wgu
at 0:54 when he was like this is how ice is formed it sounded like this is how Isis formed xD
bruhh xD
Pretty cool, I didn't know that they put salt on the roads. I wouldn't know seeing as I live on the west coast in CA and it never snows here.
Stop bragging your overprivildge and richness.
@@AK-tf3fc For your information no your incorrect, I have lived in areas where it snows a lot. In southern CA it doesn't. go fuck yourself I'm not bragging about anything
@@Riz2336 Another privileged and rich daddy boy got triggered.
They use salt in CA, you ever been to the mountains? And yes it does snow here
@@AK-tf3fc I think you’re more triggered than anybody here lol
Car in the middle of 1:49 has 3 wipers. It is a Toyota PT cruiser
I'm using this video as a example to my class for my study presentation in science
1 week later, I just got an A for science thank you so much for the help.
I've subscribed and I will put post nodification
What are your grades for spelling?
Thanks , this was very helpful
Here in Florida it may not snow but being near the equator and beaches we have lots of problems like rusting too. Great video guys.
Live near an ocean & your car also ends up "dissolving" with major rust, and any rubber-plastics becoming dry, brittle & cracking. But, vehicles driven on salted roads become very damaged. Always check the axle-boots and under-carriage for salt damage!
Water only freezes at 32 degrees when the atmospheric pressure is 14.7 psi, or sea level. At higher altitudes the freezing temp changes.
well it makes sense that salt observed liquid (melt snow), same way it works on humans. movie theaters usually put a lot of salt on their popcorn in order for your mouth to get dry and have you buy a drink as well
Very helpful
0:44
Celsius>Fahrenheit
Actually this is dumb
Thanks
This was great but I am still a little fuzzy as to how salt melts already frozen water. I understand freezing point depression going from liquid to solid, but are you telling me the surface of solid salt crystals are constantly working their way into the surface of solid phase ice tearing them apart, at freezing temperatures?
www.scientificamerican.com/article/why-do-we-put-salt-on-icy/
Same
that make a lot of sense
Yeah i was thinking th same
That was very useful thank you
How about mix salt and sand so you get advantage of both but save money on salt because you would need less per load?
Ok that's why lakes are freezing and the ocean doesn't. Like in some area I does but salt helps the ocean to do not freeze. Wooww that's amazing.
Thanks for this video without it I would absolutely fail in my exam. Thanks for this video 📹 🙌
What if they mixed salt and sand?
I get that salt lowers the freezing point of water which causes the ice to melt. What i dont get is how is it becoming colder? if the ice is 0 C then it will only melt the ice but retain its temperature 0c. in short, change of phase only. I NEED ANSWERS!
If the ice is 0 C and you put salt on it, it will not stay 0 C. It will get colder because it takes energy to melt ice, no matter how you do it.
Yay you r right I didn't new it thx!
thank you bro you helped me with mob sciences homework
I loved this thanks for making the vid! :)
Salt that freezes : Sodium Chloride
Salt that melts : Calcium Chloride
What if they can make a solid form of that liquid that is anti-h20. So you mix it in with the tar for the roads and from now on when it rains the water slides off the roads into a side gutter of some sort.
I'm pretty sure that whoever creates a concrete or some alternative that prevents snow and ice from settling on the road will make some mad $$$$. It's just, is it safe?
This video was really helpul for my science fair project, thank's a lots!
I am here Before they recommend this for u I just searched for it ;)
Wow you're gonna get so many kudos once this is recommended!
great video
but what is the controlled variable here?
Well done. nice video
so does salt and ice make an endothermic reaction?
so salt melts ice or lowers the ices melting point? I have an experintment that we need to try to not let the Ice melt, but there are sayings that salt helps slow the Ice melt? So which is it??!
Salt, or sodium chloride lowers water's melting point. The ice interrupts the process of water becoming ice. I would explain it a little more but i just really don't want to. Sorry this is so late.
All this told me was that using degrees celcius is far better than using fahrenheit. Minus 9 sounds and looks colder than saying 18 degrees.
When I was a kid I always wondering why people in western country throw salt to the street. great video btw
winters can Surpass -50 what to use to lower water freezing point? -160 . it can go negative 160 on earth.
Basically salt has such a deep hatred of anything that isn’t salt it radiates anger which melts the ice.
salt also lowers the rage point
This video kind of help me with my homework.
I've got depression
Revolutions88 dat sodium depression heck yea whoooooooosh
Pray to Jesus
@@iris8208 R/Whoosh
@@revolutions88 probably got depression because you use reddit
Bc you’re a little salty
I don't get it
Wat if the room temperature is lesser than the decreased freezing point?
What will you do then?
We Mechanics love repairing salt damaged vehicles more salt please
Is it bad for my lawn ?
Could someone explain why something that can be dissolved into water has a greater de-icing power?
Very nice video! However, I was hoping to hear «colligative properties» somewhere and learn more about it. Nevertheless, great video!
Well he just reads this from some random website so he doesn't know shit.
I hate road salt,one time i was just shoveling off the snow my dad asked me to do and a salt truck passby just salting the road then a bit of salt flung getting caught to my eye lashes and into my eye i had to undergo an eye surgery cause that pinch of salt got stuck in my eye
Salt is a non volatile solute, thats why it decreases the freezing point of water
sooo, would saltwater below 9°C freeze?
+BountyFlamor salt water does freeze, but it leaves the salt behind. The ice that forms will be salt free.
@@eatmorenachos could that method be used for desalination?
@@sytran666 Maybe, but I imagine it would only work someplace really cold---otherwise it'd probably take too much energy. I know regular desalination, from filtration and distillation takes a lot of energy too.
Song name ?
I'm watching this bc I have to make a paper about this lol
Same 2 u
Now now when you combine this and put it on your arm it causes death and maybe a epic scar by the way is it bad if I eat ice
Keren banget
Here in SE Australia in the mountains in winter we just put on snow chains onto the wheels. You won't see any salt being used on the roads at all.
MisterTMH We also use chains but I doubt any more in Australia snows like it does in WI.
A little known fact that is that in the total Alpine areas of SE Australia including Tasmania, NSW, ACT and VIC. , more snow falls each white season than usually falls in Switzerland each year. The reason for this is that Switzerland is a smaller area than the snow areas of Australia. In the back country in Winter 2014 on Mt. Bogong(1986 M.) two snow boarders were killed by an avalanche. Their bodies were buried and later excavated under 6 Metres of snow in a major avalanche. Their bodies were found days later. 2 metres= 6" foot and 6 inches in the old system.Come to the Snowy mountains in NSW or the Bogong High Plains in VIC. and see how you get on in a winter /spring blizzard out there!.
Wish i've found this video 3 years ago
Well why didn't you look for it three years ago?!
watching this because im doing this kind of experiment lol
Why aren't we funding research for better ways to prevent ice from forming !! I mean noone wants to slip no one wants to get into car reck. I find this important it can not just save the city thousands of dollars from lawsuits if can also help people not injure themselves and have it cost thousands of dollars to fix a injury.
T H A N K Y O U
0:36 & 2:03 oopsie lets redact that
IT is exothermic or endothemic
i am making a presentation on this for sience suad
Hi
20 million tons per year, where do they get all that salt ?
Hmmm, I just used Salt to de ice my driveway at -15 C the other day.
You must live in Canada.
Reactions Indeed I do :)
Oxitosen!! Plz
The ice on my wrist is mad
Maddd
Pearl.
We could make roads out of salt
Came here to cause the sample ASVAB question
Also salt kills shoes. :(
No dude, that would be salt.
Guy: that's i said, sodium chloride.
0:56
0:10
I ate ice melter thinking it was salt am I gonna die?
"this is how isis formed"
can we get a small loan of a 1 million formation of isis.
-pyrocynical
Your video explained how water is kept from freezing, but it doesn't explain how it "melts ice." Fail.
So salt doesnt melt ice
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I only care if this is going to unfreeze my sewer pipes or not it's minus 17 here
That really doesn't explain how salt melts ice on a chimical level. Too bad I thought this would really explain it.
Gregory Paul same tbh!
It doesnt melt the ice. It lowers the temp at which water freezes but is best at around 16 degrees Fahrenheit.
@@adriennevillanueva6521 take two ice cubes from your freezer, and sprinkle salt on one. Then come back and comment that salt doesn't melt ice.
The actual mechanism is that the surface of ice always has a thin layer of liquid water on it, perhaps one or two molecules thick, in equilibrium with the solid ice. The salt dissolves in this layer, shifting its equilibrium away from the solid state so that they don't immediately refreeze. When the next layer of water molecules turns to liquid, the salt ions migrate into that liquid, and they don't immediately refreeze either.
Now this process takes energy (you have to heat ice to melt it) so it causes an overall decrease in temperature of the mixture (it gets colder, but still melts). This is why you can use this effectto make ice cream.
only steers and queers come from texas... how many are you here?
Simple. Endothermic reaction.
Not exactly...
not even close
urea
that is all :3
Feel like im playing sim city hell yeah
who’s here from miraculous
100th comment baby
S A L T Y
That didn't explain nothing
zing zabuza
( ͡° ͜ʖ ͡°)
first
bad
yes
yup
De'Anthony Jackson what
Just get to the point. 2 min in and you still haven’t answered the question.
pretty average video tbh, good effort though
No it doesn’t it’s lie
Indeed i was experimental with salt and ice from fridge
But it doesn't melting
Yay I'm the 900th like
Put salt on your skin then put ice on it a wacky chemical reaction happens it’s really fun!😄😄😄
First