| Pages:
1
..
25
26
27
28
29
30 |
CycloKnight
Hazard to Others
Posts: 128
Registered: 4-8-2003
Member Is Offline
Mood: Still waiting for the emulsion to settle.
|
|
Thanks for the suggestion, I'll be trying it soon.
|
|
|
Metacelsus
International Hazard
Posts: 2531
Registered: 26-12-2012
Location: Boston, MA
Member Is Offline
Mood: Double, double, toil and trouble
|
|
Quote: Originally posted by chemcam  | | Can calcium carbide be made by bubbling acetylene gas through a solution of a calcium salt? I have an acetylene tank but I want a solid from which to
generate it by addition of water. |
No. Think about what would happen if it did form -- it would instantly react with the water to produce acetylene.
|
|
|
chemcam
Hazard to Others
Posts: 423
Registered: 18-2-2013
Location: Atlantis
Member Is Offline
Mood: I will be gone until mid-september, on a work contract.
|
|
| Quote: Originally posted by Cheddite Cheese | | Quote: Originally posted by chemcam | | Can calcium carbide be made by bubbling acetylene gas through a solution of a calcium salt? I have an acetylene tank but I want a solid from which to
generate it by addition of water. |
No. Think about what would happen if it did form -- it would instantly react with the water to produce acetylene. |
Duh! Whoops! I mean can calcium carbide be made from acetylene in any way?
|
|
|
elementcollector1
International Hazard
Posts: 2684
Registered: 28-12-2011
Location: The Known Universe
Member Is Offline
Mood: Molten
|
|
Don't think calcium carbide can be made from acetylene (the reaction would usually lean the other way).
Question: Can chlorine gas (and water dispersed therein) react with sulfuric acid? Chlorosulfuric acid exists, but apparently requires chlorination of
sulfuric acid with PCl5.
Elements Collected:52/87
Latest Acquired: Cl
Next in Line: Nd
|
|
|
DraconicAcid
International Hazard
Posts: 4278
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
| Quote: Originally posted by elementcollector1 | Don't think calcium carbide can be made from acetylene (the reaction would usually lean the other way).
Question: Can chlorine gas (and water dispersed therein) react with sulfuric acid? Chlorosulfuric acid exists, but apparently requires chlorination of
sulfuric acid with PCl5. |
I don't think so. You can react dry chlorine with SO2 to get SO2Cl2, though.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
Eddygp
National Hazard
Posts: 858
Registered: 31-3-2012
Location: University of York, UK
Member Is Offline
Mood: Organometallic
|
|
Will NH3 reduce Fe2O3?
there may be bugs in gfind
[ˌɛdidʒiˈpiː] IPA pronunciation for my Username |
|
|
Fenir
Hazard to Self
Posts: 68
Registered: 7-5-2013
Member Is Offline
Mood: No Mood
|
|
What radioisotopes would be most common in the sediment at the bottom of Chernobyl's cooling pond?
|
|
|
woelen
Super Administrator
Posts: 7976
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
No, Fe2O3 is not reduced by NH3.
|
|
|
Lambda-Eyde
National Hazard
Posts: 857
Registered: 20-11-2008
Location: Norway
Member Is Offline
Mood: Cleaved
|
|
| Quote: Originally posted by elementcollector1 | Don't think calcium carbide can be made from acetylene (the reaction would usually lean the other way).
Question: Can chlorine gas (and water dispersed therein) react with sulfuric acid? Chlorosulfuric acid exists, but apparently requires chlorination of
sulfuric acid with PCl5. |
No, conc. sulfuric acid is used to dry chlorine.
This just in: 95,5 % of the world population lives outside the USA
You should really listen to ABBAPlease drop by our IRC channel: #sciencemadness @ irc.efnet.org
|
|
|
Finnnicus
Hazard to Others
Posts: 342
Registered: 22-3-2013
Member Is Offline
|
|
Bad tasting, non toxic, easy to make? Any suggestions?
|
|
|
confused
Hazard to Others
Posts: 244
Registered: 17-3-2013
Location: Singapore
Member Is Offline
Mood: tired
|
|
capsaicin extract 
up to you if you want to try this but test it on yourself to make sure you dont give too much to any unsuspecting victim
|
|
|
Finnnicus
Hazard to Others
Posts: 342
Registered: 22-3-2013
Member Is Offline
|
|
I really think thats a little too evil... Its for my cat.
|
|
|
Pyro
International Hazard
Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline
Mood: No Mood
|
|
what's it eating?
all above information is intellectual property of Pyro. |
|
|
Finnnicus
Hazard to Others
Posts: 342
Registered: 22-3-2013
Member Is Offline
|
|
My cables. Ugh, sometimes they're used for high voltage, so they are super wrecked. (Not live while the cat could be near at all BTW)
I know that nail polish that tastes super bad is sold, but the key ingredient is hard to synth
[Edited on 9-5-2013 by Finnnicus]
|
|
|
mr.crow
National Hazard
Posts: 884
Registered: 9-9-2009
Location: Canada
Member Is Offline
Mood: 0xFF
|
|
Try "Alum" from the grocery store. Or a dollar store squirt gun with water.
Double, double toil and trouble; Fire burn, and caldron bubble
|
|
|
Finnnicus
Hazard to Others
Posts: 342
Registered: 22-3-2013
Member Is Offline
|
|
Really? Alum? I didn't know that tasted bad... Also, looking for more of a challenge than a water pistol
|
|
|
confused
Hazard to Others
Posts: 244
Registered: 17-3-2013
Location: Singapore
Member Is Offline
Mood: tired
|
|
or you could try one of there methods
http://www.wikihow.com/Make-Homemade-Cat-Repellent
|
|
|
Mailinmypocket
International Hazard
Posts: 1351
Registered: 12-5-2011
Member Is Offline
Mood: No Mood
|
|
Or you could just buy this and spray your wires with a very dilute solution of it:
http://www.ebay.com/itm/110939181456?redirect=mobile
I bought some myself, and let me tell you... If it was on a wire and I still enjoyed chewing wires, I'd damn well stop! Nasty- good for pranks too
|
|
|
Finnnicus
Hazard to Others
Posts: 342
Registered: 22-3-2013
Member Is Offline
|
|
I'm looking for something scientific, you know, home made. Maybe I'll run the "Bad Smelling Chemicals" thread through google, to check toxicity.
|
|
|
confused
Hazard to Others
Posts: 244
Registered: 17-3-2013
Location: Singapore
Member Is Offline
Mood: tired
|
|
what type of vacuum pump would you guys reccomend for vacuum filtration and vacuum distillation?
|
|
|
elementcollector1
International Hazard
Posts: 2684
Registered: 28-12-2011
Location: The Known Universe
Member Is Offline
Mood: Molten
|
|
Apparently, anything will work for filtration (except for a hand pump), even vacuum cleaners. For distillation, I would honestly recommend an
aspirator - no suckback or chemical traps necessary for a good plastic one.
Elements Collected:52/87
Latest Acquired: Cl
Next in Line: Nd
|
|
|
Glucose Oxidase
Harmless
Posts: 37
Registered: 31-12-2012
Member Is Offline
Mood: Researching Alchemy
|
|
Hello guys i was wondering if anyone can help me.
i recently started a chlorate cell but i noticed the following :
-white mush forming on the cathode (it was white with some carbon in it and made a crushing sound when pressed with a spoon and didn't react with
citric or acetic acid and gave a burning feeling when put on hand)
-a brownish residue at the bottom (seen similar material during the filtration of the solution)
-transparent crystals at the bottom ( haven't tested them yet)
My cell specs are:
-4 carbon rods from a battery (3 anجodes 1 cathode)
-2.5 kg of table salt (and i am saying table salt not NaCl because i doubt the purity)
-tap water 9 liter ( known to contain high calcium content and other salts)
-computer power supply (connected the rods to 5v)
-a 10 liter container previously used to store water
please help me identifying the material i mentioned above
[Edited on 10-5-2013 by Glucose Oxidase]
|
|
|
Acidum
Harmless
Posts: 39
Registered: 2-5-2013
Location: Serbia
Member Is Offline
Mood: Sublimed
|
|
As for cat-chewing-cables problem, I would definitely go for capsaicin. Diluted solution of course.
Maybe it sounds a bit rough, but we use similar method for teaching dogs not to eat food of unknown origin - simply by leaving pieces of food soaked
with some hot paprika (peppers) left in some places like corners or table. After couple of hearth-tearing painful screams at least You will be certain
that poor thing will survive any attempts of poisoning or electrocution...
...not to tell how good lab practice extraction of capsaicin is...
...and then I disappeared in the mist...
|
|
|
chemcam
Hazard to Others
Posts: 423
Registered: 18-2-2013
Location: Atlantis
Member Is Offline
Mood: I will be gone until mid-september, on a work contract.
|
|
I have done the extraction numerous times and ingested plenty of pure capsaicin. When you perform the lab procedure just make sure you do not use an
alcohol that has been denatured, it is likely that the denaturing chemical would be left behind, even if trace amounts I still avoid it. Go buy very
high proof drinking ethanol like everclear or moonshine then purify it more or just distill your own 96%, that's what I do. If 99% is needed you can
distill from a molecular sieve or similar means.
|
|
|
Pyro
International Hazard
Posts: 1305
Registered: 6-4-2012
Location: Gent, Belgium
Member Is Offline
Mood: No Mood
|
|
remember the jar of RP/WP/H3PO4/... that I had after the fire?
I put in water, then CuSO4 to make the present WP less reactive and then filtered it. now the filter has lots of RP but also something dark brownish,
certainly not RP. will RP react with CuSO4?
all above information is intellectual property of Pyro. |
|
|
| Pages:
1
..
25
26
27
28
29
30 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
