subsecret
Hazard to Others
Posts: 424
Registered: 8-6-2013
Location: NW SC, USA
Member Is Offline
Mood: Human Sadness - Julian Casablancas & the Voidz
|
|
Sodium Sulfide
I've been needing some sodium sulfide as a testing reagent for lead, as described by TheHomeScientist's channel on YouTube.
Here is the link to the video:
Would a reaction between sodium sulfate and carbon be sufficient? That reaction is mentioned in this article...
Thanks, any help is appreciated.
Fear is what you get when caution wasn't enough.
|
|
|
ParadoxChem126
Hazard to Others
Posts: 104
Registered: 5-4-2013
Location: USA
Member Is Offline
Mood: No Mood
|
|
You can buy it from elemental scientific.
http://www.elementalscientific.net/store/scripts/default.asp
|
|
|
Lambda-Eyde
National Hazard
Posts: 860
Registered: 20-11-2008
Location: Norway
Member Is Offline
Mood: Cleaved
|
|
If you only need it for testing for metals as their sulfides, thioacetamide (if you can find it) also works well.
This just in: 95,5 % of the world population lives outside the USA
Please drop by our IRC channel: #sciencemadness @ irc.efnet.org
|
|
|
testimento
Hazard to Others
Posts: 351
Registered: 10-6-2013
Member Is Offline
Mood: No Mood
|
|
The carbon reduction of sodium sulfate with carbon requires a high temperature, even up to 900C as per the sodium sulfate melting point, but the
method is used in industrial setups with large scale of different sulfates and it works, aside from roasting with hot air to directly dislodge the
sulfur dioxide, usually for sulfuric acid prouction scheme. 900C can be reached with ceramic crucible and propane torch using heat shields, but a lot
easier way is to use nichrome wire around the crucible with dimmer. Remember to vent the carbon monoxide safely away if you ever procceed to attempt
the process.
|
|
|
subsecret
Hazard to Others
Posts: 424
Registered: 8-6-2013
Location: NW SC, USA
Member Is Offline
Mood: Human Sadness - Julian Casablancas & the Voidz
|
|
Are there any reducing agents that would make the reaction easier to initiate?
Fear is what you get when caution wasn't enough.
|
|
|
bfesser
|
Thread Moved
24-7-2013 at 16:30 |
gdflp
Super Moderator
Posts: 1320
Registered: 14-2-2014
Location: NY, USA
Member Is Offline
Mood: Staring at code
|
|
I know this is an old thread, but heating a solution of sodium hydroxide and adding sulfur powder till no more dissolves, then chilling in the freezer
to crystallize out the sodium thiosulfate will make sodium sulfide usable for your purposes.
|
|
|
Zyklon-A
International Hazard
Posts: 1547
Registered: 26-11-2013
Member Is Offline
Mood: Fluorine radical
|
|
The sodium sulfide wont be anhydrous, though. And it's impossible to separate the hydrates.
|
|
|
gdflp
Super Moderator
Posts: 1320
Registered: 14-2-2014
Location: NY, USA
Member Is Offline
Mood: Staring at code
|
|
It doesn't need to be anhydrous for lead testing.
|
|
|
Zyklon-A
International Hazard
Posts: 1547
Registered: 26-11-2013
Member Is Offline
Mood: Fluorine radical
|
|
Yeah, it depends on what you need it for.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
