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Make Hot Ice - The Complete Guide

video Make Hot Ice - The Complete Guide

The complete guide to making hot ice and sodium acetate. How to create it, fix it, and use it. All methods from baking soda and vinegar to laboratory synthesis are shown.

The basis for hot ice is sodium acetate trihydrate, which is heated above its melting point and then cooled below its melting point so it's supercooled. It's still liquid and quickly solidifies when a seed crystal is introduced.

Sodium acetate trihydrate can be bought, or made at home by mixing three tablespoons of baking soda with one liter of vinegar and boiling down.

The video shows a detailed step by step instruction on how to do this as well as how to fix problems you might have.

39 comments
Oct 27, 2011. 12:21 AMAtmaIII says:
There is extra info in here about the specific composition of the heat packs and recharging (though that is not the primary topic of the paper)

http://www.motiva.fi/files/929/master-s-thesis-mikko-keinanen.pdf
Sep 22, 2011. 8:40 AMdsherlock says:
Awesome video: able to do it first time:mine was a gentle amber colour.
Aug 16, 2011. 11:19 AMdivad135 says:
I did this and it worked the first time :) Thank you. But it ended up being the white color of the high quality hot ice , not brown as shown in the video.
Jun 18, 2011. 9:40 PMjpoopdog says:
heres a clever idea to reduce the chances of burning the acetate, when you are boiling it to remove water,

freeze your vinagar, almost before use,

vinegar i beleive has a high melting tempurature, and will form crystals well before the water freezes.
simply put into the freezer until the tempurature drops below 16 degrees celcius, then scoop out the crystals , but include a small amount of water.

this will be about 70-90% vinegar, and will yeild just as much sodium acetate, but will require less boiling, and shorten the time you risk burning the vinagar.


Jan 5, 2011. 4:06 PMcarlinc says:
I have preformed this several times, and I must say, this video is excellent!! The walk through is clear and in great detail. Thank you for a great instructable!
Oct 19, 2009. 8:27 AMBerkin says:
Can I distill household vinegar to get rid of the impurities?
Dec 28, 2010. 7:34 AMh0meIandsecurity says:
I TAUGHT SAME!
Oct 19, 2009. 9:16 AMBerkin says:
Alright, thanks for the advice.
Dec 7, 2010. 6:22 PMrenaud4 says:
i never get to the crusty film part of the boiling and i am too lazy to let it evaporate in the air. what am i doing wrong?
i divided the ingredients by 3 so its 1/3 liter 5% Vinegar(Distilled white) and 1 tbsp of baking soda and added baking soda untill it dtopped reacting, and made sure it was clear. thne i started to boil and waited an hour to see the film, but i get nothing. i need great help because this is a very simple chemical to create, and i can make copper carbonate, nickel carbonate, copper acetate, nickel acetate, copper sulphate, and some solution with polyacrylamide
Dec 25, 2010. 12:06 PMh0meIandsecurity says:
hey NURD(YOU DIDN'T ANSWER ME PRIVATE MESSAGE!!!). If i buy 95% acetic acid and sodium bicarbonate, will it be clear(white)?
Dec 7, 2010. 7:19 PMrenaud4 says:
I only got it to work once, and if i get extra sodium bicarbonate, can i filter it in coffe filters?
i found this solution great for filtering copper acetate used to make copper carbonate by freezing the liquid from the copper carbonate and filtering the sodium bicarbonate out of the bottmom of the test tube
Dec 7, 2010. 7:16 PMrenaud4 says:
ok makes sense, so that is the solution to my problem?
Jul 20, 2010. 1:10 PMredlizard5 says:
can u use distiled white viniger
Jul 6, 2010. 12:14 PMhellonfire30 says:
do we actually need 1 liter of vinegar. can we use like 1/3 of a liter and 1 tablespoon of baking soda
Apr 20, 2010. 7:35 PMbunnieboo43 says:
This is an excellent walk-through! I will be using this in my classroom!
Apr 18, 2010. 8:04 PMwoahwoah2 says:
if you put your finger in long and it starts freezing would your finger be stuck?
Jan 25, 2010. 8:11 PMscar94 says:
did it stink while you boiled it?

Mar 3, 2010. 5:51 PMNear24 says:
 ya, a lot!
Jan 27, 2010. 6:09 PMscar94 says:
why isn't mine forming crystals on the sides of the pot

Nov 14, 2009. 12:46 PMvikings84 says:
I don't know why, but at school when ever lunch comes around my hands are freezing! even in the summer.. so i looked into this experiment to make me some homemade hand warmers because it is really annoying when my hands are constantly cold. any suggestions for containers that i could put the acetate in and reboil it so i can reuse it??
Nov 13, 2009. 7:01 AMAmyLuthien says:
So what happens if you use a copper pot?  Besides having a very shiny pot?
Nov 13, 2009. 2:53 PMAmyLuthien says:
Whoops!  Guess that makes sense - since you'd be boiling it  for so long.

Did I also hear correctly?  You can mix the solution and then set it out to evaporate, and it will for crystals?

Thanks!
Oct 20, 2009. 5:42 PMBerkin says:
I made a [http://www.youtube.com/watch?v=m1zdm_1X2O8&feature=channel video] of my sodium acetate crystallizing. I got the recipe right on my first try!
Oct 20, 2009. 11:46 AMBerkin says:
I just made some sodium acetate and accidentally froze my finger in it! I had to break up the hot ice with a knife to get it out. XD
Oct 20, 2009. 12:06 PMBerkin says:
The solution was actually warm, but not hot.

Can the proportion of vinegar to baking soda change the hardness of the crystals?
Oct 19, 2009. 4:14 AMstihl88 says:
Nice instructable NurdRage....

Actually, they do use Sodium Acetate in Salt and Vinegar flavoured chips. Ive tasted some of the stuff i made a couple of years ago and it definately is associated with salt n vinegar chips.

NurdRage, ive tried to download all of your clips on Youtube but it wont let me- do you know why i cant dl your clips?
Oct 20, 2009. 2:37 AMstihl88 says:

Yeah, Salt "N" Vinegar chips are about as edible as salt too!!!

As far as download ing clips from Youtube, theres actually a link inbuilt to the webpage that allows you to download the clip it's just that your clips don't want to download properly...

Not to worry i figured out how to download them with Firefox plugin.

Oct 19, 2009. 2:58 PMM4industries says:

Ive downloaded vids before. No piracy involved. But Puh-Lease MAKE THOSE DVD's I WILL BUY THEM. You may run into the hassle of liabilities like the ones in steal this book and Anarchists cookbook.

Words people will think and potentially sue for.

Nurd Rage showed me how to make a bomb!
I blew my hands off making strontium nitrate!
I went to the hospital for inhaling sulfur dioxide!

I know, everyone wants to make a dollar and teach the dumb-arse people of america in the process. But lawsuits sadly get in the way.

/ M4industries

Oct 19, 2009. 4:58 PMM4industries says:
understood

T_T
Oct 18, 2009. 7:00 AMThenwcp says:
Very thorough, I was able to make the Sodium acetate from the first video, but this one really breaks it down. Very good.
Oct 17, 2009. 3:59 PMsageserver says:
cool.  i saw some hot ice paks that have a little snap button that when you press it the freezing with start.  Can you just shake the bag and it'll start?
Oct 17, 2009. 3:08 PMbloke2022 says:
nice.

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NurdRage is a dedicate group of science nerds trying to further amateur science with direct how-to instructions in video format. We saw what was already online and we thought "we could do better"... s...
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