Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Probably a Silly Question
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 31-8-2014 at 12:07
Probably a Silly Question


Is Glacial Acetic Acid the same as Anhydrous Acetic Acid, and is that the same as Acetic Anhydride ?



View user's profile View All Posts By User
hissingnoise
International Hazard
*****




Posts: 3940
Registered: 26-12-2002
Member Is Offline

Mood: Pulverulescent!

[*] posted on 31-8-2014 at 12:16


Glacial acid is anhydrous or nearly so, but the anhydride forms the acid only on hydration!

View user's profile View All Posts By User
woelen
Super Administrator
*********




Posts: 8014
Registered: 20-8-2005
Location: Netherlands
Member Is Offline

Mood: interested

[*] posted on 31-8-2014 at 12:38


Acetic anhydride is formed from two molecules of acetic acid:

H3C-C(O)OH + HO(O)C-CH3 ---> H3C-C(O)-O-C(O)-CH3 + H2O

This reaction normally goes the other way around, acetic anhydride added to water gives acetic acid.




The art of wondering makes life worth living...
Want to wonder? Look at https://woelen.homescience.net
View user's profile Visit user's homepage View All Posts By User
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 31-8-2014 at 12:38


So Acetic - Water = Glacial = Anhydrous = Anhydride + Water.

Eeek.

I'll just do Schweitzers, dissolve some cotton, giggle for a minute, then chuck the result.

The invention of a paint-on-able fabric will have to wait.

Was thinking of calling it Crayon.




View user's profile View All Posts By User
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 31-8-2014 at 12:40


Oh !

Thanks woelen.

I'll look that up further.

Edit:

At a quick glance, a Noob's mind wonders if Glacial Acetic in Oleum would produce Acetic Anhydride.

[Edited on 31-8-2014 by aga]




View user's profile View All Posts By User
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 31-8-2014 at 12:59


Oh2

Seems it's a "DEA List II precursor for heroin" so we'd better stop there and learn nothing new.

It's true : Ignorance really is Bliss.

Back when Nothing was known about Chemistry, it must have been a Blast, literally.




View user's profile View All Posts By User

  Go To Top