itsallgoodjames
Hazard to Others
Posts: 276
Registered: 31-8-2020
Location: America Lite
Member Is Offline
|
|
Weird scent from electrolysis of sodium hydroxide solution. Any ideas as to what it could be?
I was doing electrolysis of a solution of sodium hydroxide. Copper is being used as both the anode and cathode, as the intent of this is to produce
copper hydroxide. It was going fine for a while, until it began to smell odd, somewhat like the smell of the dust burning off running vacuum tubes.
My first thought was maybe it's chlorine impurities in the sodium hydroxide, as I used drain cleaner grade, but it doesn't smell of chlorine. My only
idea is maybe it's from the flux I used soldering together the electrodes.
Any thoughts?
Nuclear physics is neat. It's a shame it's so regulated...
Now that I think about it, that's probably a good thing. Still annoying though.
|
|
|
BromicAcid
International Hazard
Posts: 3246
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
My guess would be aresolized sodium hydroxide from the bubbling electrodes. During electrolysis of molten sodium hydroxide it was very prevalent.
|
|
|
itsallgoodjames
Hazard to Others
Posts: 276
Registered: 31-8-2020
Location: America Lite
Member Is Offline
|
|
Hmm, that might be it. I'm not sure what aerosolized sodium hydroxide smells like, but there was definitely a bit of a stinging sensation.
Nuclear physics is neat. It's a shame it's so regulated...
Now that I think about it, that's probably a good thing. Still annoying though.
|
|
|
Rhodanide
Hazard to Others
Posts: 348
Registered: 23-7-2015
Location: Ｔｈｅ ８０ｓ
Member Is Offline
Mood: That retro aesthetic
|
|
Quote: Originally posted by itsallgoodjames  | | Hmm, that might be it. I'm not sure what aerosolized sodium hydroxide smells like, but there was definitely a bit of a stinging sensation.
|
Maybe you're smelling your sinus flesh being turned into soap! oooOOOooOOOhhhhhHHH!!
Hah.
But in all real seriousness, Bromic is probably right. Aerosols do have smells to them. Back in my "very stupid" days of home chemistry, I remember
how aerosol-ized Cobalt and Nickel salt solutions smelled. Of course, my dumb young ass didn't know the potential danger of that. Aerosols suck, don't
huff them, friend! Be safe.
|
|
|
macckone
Dispenser of practical lab wisdom
Posts: 2168
Registered: 1-3-2013
Location: Over a mile high
Member Is Offline
Mood: Electrical
|
|
drain cleaner often has fragrance in it. no clue why but it does.
between aerosols and god knows what impurities just keep that stuff covered and don't sniff it.
|
|
|
MidLifeChemist
Hazard to Others
Posts: 192
Registered: 4-7-2019
Location: West Coast USA
Member Is Offline
Mood: precipitatory
|
|
| Quote: Originally posted by Rhodanide |
But in all real seriousness, Bromic is probably right. Aerosols do have smells to them. Back in my "very stupid" days of home chemistry, I remember
how aerosol-ized Cobalt and Nickel salt solutions smelled. Of course, my dumb young ass didn't know the potential danger of that. Aerosols suck, don't
huff them, friend! Be safe. |
Out of curiosity, how did you aerosol-ize Cobalt and Nickel salts solutions?
|
|
|
HydrogenSulphate
Harmless
Posts: 38
Registered: 13-10-2019
Member Is Offline
Mood: Caffeinated
|
|
| Quote: Originally posted by MidLifeChemist | | Quote: Originally posted by Rhodanide |
But in all real seriousness, Bromic is probably right. Aerosols do have smells to them. Back in my "very stupid" days of home chemistry, I remember
how aerosol-ized Cobalt and Nickel salt solutions smelled. Of course, my dumb young ass didn't know the potential danger of that. Aerosols suck, don't
huff them, friend! Be safe. |
Out of curiosity, how did you aerosol-ize Cobalt and Nickel salts solutions? |
There's one such scenario I can think of: if you are preparing the metal salts by the carbonate-dilute acid reaction, the vigorous effervescence as
carbon dioxide gas is given off can generate a fine mist or aerosol. It is a good idea to cover the reaction flask or beaker with a watch glass or
similar to contain the aerosol, especially if the salts being prepared from the carbonate and dilute acid contain Co, Cu, Ni, Cr, Ba, Pb, etc, etc,
etc, ions.
|
|
|
EthidiumBromide
Harmless
Posts: 42
Registered: 27-9-2020
Member Is Offline
Mood: Effervescent
|
|
Or reactions involving hydrogen peroxide, where it will decompose generating bubbles of oxygen - generally, any reaction which leads to effervescence
of the mixture.
|
|
|
TriiodideFrog
Hazard to Others
Posts: 108
Registered: 27-9-2020
Member Is Offline
|
|
Maybe for some reason, chlorine gas started to form? I dunno.
|
|
|
itsallgoodjames
Hazard to Others
Posts: 276
Registered: 31-8-2020
Location: America Lite
Member Is Offline
|
|
I can't think of anywhere the chlorine would come from though. It also doesn't really smell of chlorine. More like burning dust. I imagine
bromicacid is probably right, it's probably my nose (and everyone else in the house's noses) turning to soap.
Nuclear physics is neat. It's a shame it's so regulated...
Now that I think about it, that's probably a good thing. Still annoying though.
|
|
|
Errata
Harmless
Posts: 5
Registered: 6-9-2020
Member Is Offline
Mood: Yes
|
|
Safer alternative method for making copper hydroxide is just electrolysis of sodium or magnesium sulfate with same copper electrodes. Have tried this
myself and it works really well, however a small amount of copper does end up electroplating instead of precipitating. Magnesium sulfate is available
OTC in bulk, much cheaper (and probably purer) than drain cleaner.
|
|
|
itsallgoodjames
Hazard to Others
Posts: 276
Registered: 31-8-2020
Location: America Lite
Member Is Offline
|
|
I recently received 5lbs of copper sulfate. The point of the copper hydroxide was to be used as a source of copper for copper salts, without having
to first go through copper nitrate. I was at the time out of copper sulfate, and I wanted to make copper complexes. Now that I once again have
copper sulfate, I no longer need the copper hydroxide.
Nuclear physics is neat. It's a shame it's so regulated...
Now that I think about it, that's probably a good thing. Still annoying though.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
