Peskatore
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Problem with pacification of Ni.
I try to make nickel sulphate threw put Ni pieces in concentrated H2SO4.
But nothing happens.
How can I brake this pacification?
Are there same problem if I use HCl?
Thanks for help.
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m1tanker78
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Use nitric acid instead or a mix of hydrogen peroxide and H2SO4 will get you there more quickly.
Tank
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cyanureeves
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i epoxied a canadian quarter to the bottom of a shampoo bottle filled with diluted hcl acid and hooked it up to a phone charger and had nickel
chloride in no time.i got a nice yellow-green powder of nickel chloride,i learned from this site that the nickel anode needs to be on the bottom. i
never could make it with the anode and cathode both on the surface,i forgot why. the green dissolved nickel will sit at the bottom and not mix with
the top layer which can even be syphoned off if you use a clear bottle.
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garage chemist
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Try heating the conc. H2SO4 with the nickel in it. Hot conc. H2SO4 is a powerful oxidiser and strongly attacks all metals except gold and the platinum
group.
SO2 will be released, so work outside or under the fume hood.
If you want to dissolve nickel in HCl, you can either add H2O2 (simple and effective) or use the nickel as anode at the bottom of the vessel and a
small piece of stainless steel as cathode at the top of the vessel. The nickel chloride solution, which is more dense than the HCl, stays at the
bottom of the vessel and doesn't reach the cathode where it would otherwise be reduced back to nickel. Cyanureeves has already mentioned this.
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Peskatore
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Thanks. I mixed H2SO4 in little H2O2 solution and put the Ni in that. Its quickly solute and becomes green.
Unfortunately it also developed some nasty gas SO2, HS? But I have al my windows open now.
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Peskatore
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Another question. Are there any simple reagent solution making specific colour for Ni?
Its must give different colour from Fe.
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DJF90
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Ni content can be determined gravimetrically using the complex with dimethylglyoxime.
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cyanureeves
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ammonium hydroxide?
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LanthanumK
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Ammonia would also precipitate other metal hydroxides like Fe.
hibernating...
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Peskatore
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Hera are a test with K(Fe(CN6)), KSCN and amonia.
<a href="http://www.flickr.com/photos/77233366@N08/6921467925/" title="Fe-test-1 by Torulf, on Flickr"><img
src="http://farm8.staticflickr.com/7039/6921467925_2904eae0c5.jpg" width="500" height="377" alt="Fe-test-1"></a>
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DougTheMapper
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| Quote: | | i epoxied a canadian quarter to the bottom of a shampoo bottle filled with diluted hcl acid and hooked it up to a phone charger
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Now THAT's a facebook status.
Victor Grignard is a methylated spirit.
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cyanureeves
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Quote:
i epoxied a canadian quarter to the bottom of a shampoo bottle filled with diluted hcl acid and hooked it up to a phone charger.
it does read crazy. i meant to say that i stuck a quarter in half ways at the bottom of the bottle and epoxied it,then used it as an anode
using a 5volt phone charger.
[Edited on 23-2-2012 by cyanureeves]
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Poppy
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doesphone chargers work by their own without overstanding currets?As for anhydrous acids they all work well when heated. I could e
ven dissolve Fe2O3 in 85% H3PO4 at 1/2 mole ratio, the water insoluble rsulting salt took 2 days to precipitate
[Edited on 2-25-2012 by Poppy]
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cyanureeves
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yes phone chargers put out voltage 5v.3v 9v and 6v respectively they just dont put out alot of amperage but enough to work forever.simply clip the
ends off and find the pos and neg with a voltmeter. i use them to electroplate with and even made small scale chlorate cells.it does not take hardly
any voltage to dissolve metals in acid solutions.
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Poppy
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you sir mean chlorate accel parkerizing? we could share some information on that I got a useful recipe below
Attachment: 27920.pdf (496kB)
This file has been downloaded 1901 times
[Edited on 2-25-2012 by Poppy]
[Edited on 2-25-2012 by Poppy]o sorry you mean the cell matterial
[Edited on 2-25-2012 by Poppy]
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cyanureeves
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no Poppy. i mean i've made potassium chlorate but all my nickel plating that i have done looks like parkerized stainless steel. the shiny nickel
plating is a whole other process with chromium and i havent had success with chrome plating but all my plating is done with phone chargers.i dont have
a fancy plating machine.
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Poppy
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Im planning to dissolve some Ni too soon from the leftover of some stainless steel plates which are going to be cut at my gara
ge till nexttime
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Peskatore
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I have an idea about making nickel sulfate with out sulfur acid.
Put metallic Ni in CuSO4 solution, Ni in surplus, and you get NiSO4.
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Poppy
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Pet,
I've just tried dissolving stainless steel at home, could not put a reaction to take place at cold, not sure yet whats in there, chromium or nickel.
Its still left to try a pre-boiling water/acid mix, the electrocatalysed reaction and a decent acid for the purpose, and the CuSO4 idea of yours, of
course.
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LanthanumK
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For stainless steel oxidation, make a stainless steel object the anode of a aqeuous NaCl electrolytic cell. You will get a massive amount of iron,
chromium, and nickel hydroxides and discover that stainless steel is not so stainless after all. The resulting stainless steel object will be full of
corroded pits.
hibernating...
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Poppy
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Any hints on explaing those many pits formed after corrosion?
Non smoothed alloys maybe?
As for electrolysis, small currents didn't seem to catalyse the process.
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