Sciencemadness Discussion Board

Water marbles

DNA - 20-1-2011 at 00:03

Anyone know what kind of reaction is going on here?
It is quite cool to see.

With sodium acetate, calcium bicarbonate and iodized salt and water this is achieved.

smuv - 20-1-2011 at 00:29


DougTheMapper - 20-1-2011 at 03:51

Sodium polyacrylate spheres. They sell these at the dollar store where I live.

Saerynide - 20-1-2011 at 05:57

Hydrogels :D They can literally become invisible in water because they are almost all water. I used to research them. These ones are hydrogel balls for growing plants

[Edited on 1/21/2011 by Saerynide]

hkparker - 20-1-2011 at 21:45

Yea thats fake... kind of obvious. Just gel balls that become invisible

psychokinetic - 21-1-2011 at 00:18

That was very hard to watch.

Also, the marbles would smush into each other and become one, no?. They were all exactly the same, hence the prior conclusion that they are already marbles of some sort.


[Edited on 21-1-2011 by psychokinetic]

Sayyan - 21-1-2011 at 00:57

This video should clear it up:

franklyn - 29-1-2011 at 19:30

- and now frozen soap bubbles


condennnsa - 6-3-2011 at 22:34

can sodium polyacrylate be synthesized at home?

Chordate - 7-3-2011 at 03:13

Its a sodium neutralised form acrylic acid polymer. If I had to guess I'd bet that mixing sodium acrylate and a little benzoyl peroxide together would get the reaction going, but getting it to form perfect spheres likely involves careful control of the reaction, maybe some sort of industrial process where the polymerizing material is turned into an aerosol to form the little spheres.

I Like Dots - 15-10-2015 at 09:18

Can these absorb anything else besides water? Im trying to see if they can absorb any flammable solvent, and have had no luck so far.

Ive tried Acetone, Methyl Ethyl Ketone, Methanol, Toluene, Ethyl Acetate, Isopropanol and Ethanol (above 50%). None of those solvents show any sign of absorption.

Im sure the polymer can only absorb water due to the nature of the polymer, just wondering if anybody else had any info or suggestions.

[Edited on 15-10-2015 by I Like Dots]

ave369 - 15-10-2015 at 11:36

Concerning the video:

As far as I know, calcium bicarbonate does not exist as a crystalline solid, it decomposes into calcium carbonate and carbon dioxide if you try to crystallize it. This reminds me of an old occult recipe for a ring of invisibility, for which you need mercury that stays solid under normal conditions, and long hair from a hyena.

Correct me if I'm wrong, but if I'm wrong, it isn't grocery store stuff anyway. This should be the marker that the author of the video is pulling your leg.

[Edited on 15-10-2015 by ave369]