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4hv.org :: Forums :: Chemistry
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Powder on mercury

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Proud Mary
Sun Sept 12 2010, 12:16AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
You don't mean sodium amalgam produced as a by-product of chlorine manufacture by mercury cell brine electrolysis, do you?

The sodium amalgam formed at the mercury cathode is siphoned off and reacted with water, liberating hydrogen. Sodium hydroxide is formed and the mercury reverts to its original state and can be returned to the cell where the cycle begins afresh.
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HazzWold 1993
Sun Sept 12 2010, 03:10AM
HazzWold 1993 Registered Member #2563 Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
Just a thought, would i do better seperating the powder off the mercury by just sucking the clean stuff from the middle, or pushing the mercury out of a large syringe with a cotton ball or something to filter it?
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Adam Munich
Sun Sept 12 2010, 03:14AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
I suggest another method I use.

Place the mercury in a cooking funnel lined with a piece of printer paper. Poke a small hole in it with a pin, and the pressure (mercury is dense) will force the clean stuff through the hole.
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radiotech
Sun Sept 12 2010, 03:30AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
You don't mean sodium amalgam produced as a by-product of chlorine manufacture by mercury cell brine electrolysis, do you?


No its a putty like glob "that behaves as though" is was an amalgam of Hg and NH4--(which never has been found).
Its such a simple experiment- just a dry cell or two and ammonia water forte.

Another thing I remember is a thin glass tube filled with a electrolyte and a drop of mercury. The drop could be 'propelled' along by powering the ends with DC one way and brought back by reversing the polarity. and the electrolyte was a witches brew to make it work
It seemed to create a bit of turbulence at the mercury drop causing it to roll. when the pole shifted, the thing happened at the other end.


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HazzWold 1993
Sun Sept 12 2010, 04:06AM
HazzWold 1993 Registered Member #2563 Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
oh my god thankyou grenadier, it worked wonderfully. i did a kilo of it and its like a mirror!
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Proud Mary
Sun Sept 12 2010, 04:08AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Mercury and ammonia sounds like a very dangerous combination.
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Adam Munich
Sun Sept 12 2010, 04:17AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
HazzWold Labs wrote ...

oh my god thankyou grenadier, it worked wonderfully. i did a kilo of it and its like a mirror!

Speaking of mirrors...

If you shine a laser on mercury, interesting things can happen.
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Fraggle
Sun Sept 19 2010, 10:35PM
Fraggle Registered Member #1526 Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
Which reminds me, you could make a small or even quite large liquid mirror telescope with that amount of mercury - that would be an amazing project!
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Adam Munich
Sun Sept 19 2010, 11:45PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Yeah, but then there's the dust problem again.
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radiotech
Mon Sept 20 2010, 01:10AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
If you heated mercury instead of of water in a turbine it would work but they havent tried that in long time. Perhaps that project could be lifted out of the mothballs.
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