| Pages:
1
2 |
White Yeti
National Hazard
Posts: 816
Registered: 20-7-2011
Location: Asperger's spectrum
Member Is Offline
Mood: delocalized
|
|
Quote: Originally posted by blogfast25  | | Quote: Originally posted by Endimion17 | 2. Coffee filters? Come on. That's recycled paper. At least use apothecary filter paper sold in large sheets. It's not expensive.
Recycled paper can leech stuff, and white filter papers used in laboratories are designed to be more inert. Or just buy those round papers that are
tested against conc. HCl/HF. |
I have to slightly disagree. Coffee filters, even paper towels will remain the choice of quite a few hobbyists. I started with them and still use them
quite often. Coffee filters have some disadvantages but leeching is probably not that bad: remember that this is a food product.
As regards apothecary paper you certainly can't get it from pharmacies here in the UK, these have all become quite dumbded-down places where little or
no preparation goes on and where it's all nothing more than buying and selling. If I asked the one around the corner for some AP she'd look at me as
if I'd come straight from Mars... |
I'll have to agree with blogfast25. I use paper towels when I have to filter out an enormous amount of crud from a relatively large volume (usually
when I dispose of waste). I once had to dispose of the contents of a home made battery. It was so awfully disgusting that I wished I could just dump
the whole thing into the trash or down the toilet. I filtered it out with paper towels, and neutralised the aqueous components with baking soda. and
everything went well.
You have to be flexible. Specialised filters and acid resistant membranes are not good for everything. Sometimes a good old paper towel or coffee
filter can get the job done, better. If I was preparing ultra pure chemicals to use in an unforgiving chemical reaction, then I would use the
appropriate filter.
|
|
|
Panache
International Hazard
Posts: 1290
Registered: 18-10-2007
Member Is Offline
Mood: Instead of being my deliverance, she had a resemblance to a Kat named Frankenstein
|
|
Chlorine gas can also be produced by treating some solid NaCl with a stream of fluorine gas, be careful with this though as fluorine requires careful
handling.
It will not need drying produced in this wAy?
In case anyone cares liquifying the element is quite simple, has anyone observed solid cl2?
|
|
|
AndersHoveland
Hazard to Other Members, due to repeated speculation and posting of untested highly dangerous procedures!
Posts: 1986
Registered: 2-3-2011
Member Is Offline
Mood: No Mood
|
|
This only works if there is no water, since fluorine spontaneously ignites on contact with water. The F2 gas would need to be passed into molten NaCl.
Passing F2 into salt water results in perchlorate being formed.
NaCl + (4)H2O + (4)F2 --> NaClO4 + (8)HF
the reaction is probably not very efficient, as the main reaction would be
(2)H2O + (2)F2 --> (4)HF + O2
|
|
|
blogfast25
International Hazard
Posts: 10562
Registered: 3-2-2008
Location: Neverland
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by Panache | Chlorine gas can also be produced by treating some solid NaCl with a stream of fluorine gas, be careful with this though as fluorine requires careful
handling.
|
That sound like fun (NOT) and the most ridiculous use of fluorine I've heard of in a while. Apart from these Germans setting fire to a frozen chicken
with a stream of F2! (see UTooob). 
"be careful with this though as fluorine requires careful handling." Dixit Panache, 'King of the chemical understatement'? 
[Edited on 23-9-2011 by blogfast25]
|
|
|
| Pages:
1
2 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
