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Off Topic chemistry question

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X22

04-21-2007 17:42:38




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I built an electrolyzer to make hydrogen to burn in my pickup. I used stainless steel for the +/- conductors and magnesium sulfate and water as the solution. After you run it a few days the container which holds the solution gets a thick layer of crud inside that lools like liquid rust. What is this and can it be eliminated?




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T_Bone

04-22-2007 05:49:37




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 Re: Off Topic chemistry question in reply to X22, 04-21-2007 17:42:38  
Hi X22,

You can also mix vinegar with salt and off gas hydrogen.

You might also try using type 316 SS.

T_Bone



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LumbrJakMan

04-22-2007 05:19:05




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 Re: Off Topic chemistry question in reply to X22, 04-21-2007 17:42:38  
You have reached the saturation point of the electrolyte. Now if you were to suspend a generous amount of Festeris Powder it will lower that. Be careful to not reach the animated gravity reaction point. If this happens it will ceretainly deter the ability of the powder to absorb the excess electrons which promotes diethylite "Runaround" . Also be careful to maintain a specific scale of your trontium levels and watch that they dont enter the danger zone. Good Luck !!

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Eric SEI

04-21-2007 18:32:05




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 Re: Off Topic chemistry question in reply to X22, 04-21-2007 17:42:38  
If you are using distilled water and are not replacing it as it is broken down, then I would expect the magnesium sulfate is precipitating out as the solution strengthens. If you are not using distilled water, then all of the suspended minerals will precipitate out as you go.

All minerals and chemicals have a maximum that they will stay in solution at, as the water is broken down (or evaporates) the solution becomes stronger and stronger until it can no longer hold all of the mineral or chemical, at which time it will precipitate out.

The harder your water is, the quicker the minerals will precipitate out.

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X22

04-21-2007 18:45:55




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 Re: Off Topic chemistry question in reply to Eric SEI, 04-21-2007 18:32:05  
We have soft water here. When you mix the magnesium sulfate (epson salt) with water it is almost clear but after a while it becomes rust colored sludge. Can the stainless steel be breaking down and causing this?



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RAB

04-22-2007 01:00:14




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 Re: Off Topic chemistry question in reply to X22, 04-21-2007 18:45:55  
"Soft" water only refers to the abscence of calcium and magnesium salts. There can be all sorts of other compounds in there that won"t make the water "hard".
Regards, RAB



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HENRY E NC

04-21-2007 18:28:46




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 Re: Off Topic chemistry question in reply to X22, 04-21-2007 17:42:38  
I imagine that the crud is the minerals and other disolved junk in the water. I think the answer is to use distilled water or that water which is purified by osmosis.



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