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Author Topic: What household chemicals are best for absorbing water?  (Read 16527 times)

Offline Bill.D.Katt.

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How would I obtain chemicals that would absorb water? I know of sodium polyacrylate, but I was wondering if there were any household chemicals that could be manipulated to serve this purpose. I was thinking CuSO4-5H20 (standard form) and then simply heat it until it becomes a white powder. Would this work, or is there a better method?
« Last Edit: 05/12/2010 11:13:10 by chris »


 

Offline Don_1

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Re: What household chemicals are best for absorbing water?
« Reply #1 on: 05/12/2010 00:55:19 »
Whats wrong with plain simple table salt, sodium chloride?
 

Offline Chemistry4me

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Re: What household chemicals are best for absorbing water?
« Reply #2 on: 05/12/2010 02:44:21 »
I hear that uncooked rice works
 

Offline Chemistry4me

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Re: What household chemicals are best for absorbing water?
« Reply #3 on: 05/12/2010 02:49:04 »
Also probably silica gel, they use it to dry flowers
 

Offline Bill.D.Katt.

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Re: What household chemicals are best for absorbing water?
« Reply #4 on: 05/12/2010 06:55:01 »
Would sodium chloride really work? I didn't think that it would pull H2O out of a gas. Oh, and this gas is pretty cold too, not sure if that changes anything.
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #5 on: 05/12/2010 11:49:13 »
You can buy CaCl2 as a drying agent for domestic use. Epsom salts (MgSO4.7 H2O) can also be dried down to the anhydrous form and used as a drying agent.
What do you want to dry?
Incidentally, very cold gases are dryish anyway- the water condenses out.
 

Offline Bill.D.Katt.

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What household chemicals are best for absorbing water?
« Reply #6 on: 05/12/2010 18:18:28 »
Here is the entire experiment: I have a solution of NaClO Which I brought down to about O C. I also have a solution of HCl which I brought down to O C (This is to slow the reaction rate, and make the experiment containable). Tubing runs from a container in which these two solutions are placed to another container with the drying agent, the drying agent (presumably) removes the H2O, the Cl2 gas continues to a solution of dry ice and acetone (poor mans liquid nitrogen) where the Cl2 becomes a liquid. Eventually I would like to insert S into the mixture of Cl2 and make SCl2, but the presence of any H2O would make it highly dangerous (due to gas expansion), and I would need to buy a new container because the reaction is highly exothermic and would probably vaporize the Cl2 before it got a chance to react with the S.

-I have a strange interest with super cold liquids, don't ask me why (I don't know why :))
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #7 on: 06/12/2010 07:00:35 »
The traditional drying agent for Cl2 is H2SO4. Normally I would say it's a bit dangerous for domestic use but if you plan to play with liquid chlorine...
 

Offline Don_1

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What household chemicals are best for absorbing water?
« Reply #8 on: 06/12/2010 12:09:58 »
You've given me an idea. Mrs Don_1 wants the kitchen redecorated.

I'll just put this 10ltr tub of white emulsion on the floor in the middle of the kitchen. Now, a litre of glycerin in this beaker and push in to the middle of the paint. There, that should do the trick. Now, where's the nitric acid?
 

Offline Bill.D.Katt.

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What household chemicals are best for absorbing water?
« Reply #9 on: 06/12/2010 16:28:47 »
Glad to see I'm inspiring chemistry experiments  :)

What concentration would the H2SO4 have to be? Somewhere around 18.4 molar?
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #10 on: 06/12/2010 19:16:25 »
98% or better so yes, about 18.4M

Do you know just how unpleasant liquid chlorine is?
 

Offline Bill.D.Katt.

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What household chemicals are best for absorbing water?
« Reply #11 on: 07/12/2010 03:03:27 »
Yes, I actually do. I have made a little bit before, but it was sitting right next to frozen water, and there was just barely enough to see. But I know the smell of chlorine, and have worked with it before. A harsh chemical to be sure.

I work with this stuff outside, and always check the prevailing winds before starting the experiment.
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #12 on: 07/12/2010 06:59:47 »
That won't stop the shrapnel when the kit fails.
 

Offline Bill.D.Katt.

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What household chemicals are best for absorbing water?
« Reply #13 on: 07/12/2010 19:15:18 »
Quite true. I've been trying to think of a device that will allow gas expansion into an elastic container. This way, as the reaction proceeds the gas will re-enter the area where the reaction is taking place. I guess low cost would just be a rubber balloon, but I will have to see how it holds up in the extreme evironments this experiment creates.
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #14 on: 07/12/2010 20:52:19 »
Chlorine trashes rubber quite well.
 

Offline Bill.D.Katt.

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What household chemicals are best for absorbing water?
« Reply #15 on: 08/12/2010 01:00:29 »
How fast would the rubber be effected? (lets consider the partial pressure of Cl2 to be the total pressure)
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #16 on: 08/12/2010 06:55:11 »
I don't know and I wouldn't like to be there when someone found out.
 

Offline Gold-N-Scrap

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What household chemicals are best for absorbing water?
« Reply #17 on: 26/12/2010 20:56:38 »
try scrubbing your Cl2 gas trough NaOH, it is highly hygroscopic, specially when in pellet form with lot's of surface area, silica gel will work, but not as well as HaOH. (this is nasty stuff btw)
 

Offline Bill.D.Katt.

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What household chemicals are best for absorbing water?
« Reply #18 on: 27/12/2010 04:50:59 »
I ended up using CaCl2 because of the reduced risk of contamination, and availability of access. Thanks all.
 

Offline lightarrow

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What household chemicals are best for absorbing water?
« Reply #19 on: 27/12/2010 15:31:21 »
You've given me an idea. Mrs Don_1 wants the kitchen redecorated.

I'll just put this 10ltr tub of white emulsion on the floor in the middle of the kitchen. Now, a litre of glycerin in this beaker and push in to the middle of the paint. There, that should do the trick. Now, where's the nitric acid?
I think Mr. Bean has already exploited your idea :)
 

Offline AlphaPiRho

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What household chemicals are best for absorbing water?
« Reply #20 on: 05/01/2011 10:57:15 »
A simple "catliter" will absorbe H20, i know this because in some shops to "sop" a petroleum spill we used a household "catliter" which absorbed the petroleum that was on the concrete.
 

Offline Bored chemist

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What household chemicals are best for absorbing water?
« Reply #21 on: 05/01/2011 16:53:11 »
try scrubbing your Cl2 gas trough NaOH, it is highly hygroscopic, specially when in pellet form with lot's of surface area, silica gel will work, but not as well as HaOH. (this is nasty stuff btw)
If you don't know that NaOH reacts with Cl2 then, perhaps, you shouldn't be posting "advice" here.
 

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What household chemicals are best for absorbing water?
« Reply #21 on: 05/01/2011 16:53:11 »

 

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