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Author: Subject: The short questions thread (3)
CycloKnight
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[*] posted on 27-4-2013 at 09:37


Thanks for the suggestion, I'll be trying it soon.
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Metacelsus
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[*] posted on 27-4-2013 at 11:53


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.




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chemcam
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[*] posted on 27-4-2013 at 17:17


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?




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elementcollector1
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[*] posted on 29-4-2013 at 09:46


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.




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DraconicAcid
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[*] posted on 29-4-2013 at 09:50


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.




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[*] posted on 1-5-2013 at 07:53


Will NH3 reduce Fe2O3?



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[*] posted on 7-5-2013 at 17:29


What radioisotopes would be most common in the sediment at the bottom of Chernobyl's cooling pond?
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[*] posted on 7-5-2013 at 23:48


Quote: Originally posted by Eddygp  
Will NH3 reduce Fe2O3?
No, Fe2O3 is not reduced by NH3.



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Lambda-Eyde
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[*] posted on 8-5-2013 at 00:01


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.




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[*] posted on 9-5-2013 at 01:23


Bad tasting, non toxic, easy to make? Any suggestions?



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confused
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[*] posted on 9-5-2013 at 06:57


capsaicin extract :P
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:D
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[*] posted on 9-5-2013 at 07:08


I really think thats a little too evil... Its for my cat.



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Pyro
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[*] posted on 9-5-2013 at 07:14


what's it eating?



all above information is intellectual property of Pyro. :D
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[*] posted on 9-5-2013 at 08:17


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]




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mr.crow
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[*] posted on 9-5-2013 at 15:35


Try "Alum" from the grocery store. Or a dollar store squirt gun with water.



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[*] posted on 9-5-2013 at 15:49


Really? Alum? I didn't know that tasted bad... Also, looking for more of a challenge than a water pistol :D



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confused
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[*] posted on 9-5-2013 at 16:18


or you could try one of there methods
http://www.wikihow.com/Make-Homemade-Cat-Repellent
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[*] posted on 9-5-2013 at 16:39


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 ;)
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[*] posted on 9-5-2013 at 16:59


I'm looking for something scientific, you know, home made. Maybe I'll run the "Bad Smelling Chemicals" thread through google, to check toxicity.



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[*] posted on 10-5-2013 at 04:36


what type of vacuum pump would you guys reccomend for vacuum filtration and vacuum distillation?
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[*] posted on 10-5-2013 at 05:26


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.



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[*] posted on 10-5-2013 at 10:28


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]
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[*] posted on 10-5-2013 at 11:31


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...




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[*] posted on 10-5-2013 at 12:13


Quote: Originally posted by Acidum  

...not to tell how good lab practice extraction of capsaicin is...


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.




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Pyro
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[*] posted on 10-5-2013 at 12:30


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?




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