todo
Harmless
Posts: 1
Registered: 5-12-2017
Member Is Offline
Mood: No Mood
|
|
Glacial acetic acid dillution to 80%,from 99.9%
Hello everybody,i would like to now, how i can make soliution,1litre 80% acetic acid,from 99.9% glacial acetic acid?thank you
|
|
|
gdflp
|
Thread Moved
5-12-2017 at 04:37 |
Sulaiman
International Hazard
Posts: 3696
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Online
|
|
First you should clarify what you mean by 80%,
(by molar, mass or volume ratio for example)
Assuming that you mean 80% by weight then you will require 200g water per 800g acetic acid
if by volume then,,
1 part water per four parts glacial acetic acid, by volume, teaspoon/cup/cc/ml/cu.inch/....
By volume can be trickier as sometimes the volume of a mixture of liquids is not the same as the sum of their individual volumes,
but ignoring this usually small error,
add 200ml water to 800ml 99.9% acid to make 1000ml 80% acid
Before you start, you could check the freezing point temperature to be sure that your glacial is actually 99.9%
https://en.wikipedia.org/wiki/Acetic_acid_(data_page)
https://en.wikipedia.org/wiki/Acetic_acid
P.S. I ignored the 0.1% because for most of us it is non-trivial to measure volume to 0.1% absolute accuracy,
usually digital weighing scales are linear even if not calibrated, so weight ratios can be quite accurate.
P.P.S. So far I have not needed to make up a solution to an accurate ratio,
usually it is more important to know the actual concentration,
e.g. In general, I would rather have for example 77.65 +/-0.01 % than 80.0 +/-0.1%
(in practice different components of a mixture will have different rates of evaporating into, or being absorbed from, the atmosphere, so maintaining a
mixture at high precision is often difficult)
[Edited on 5-12-2017 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
Corrosive Joeseph
National Hazard
Posts: 915
Registered: 17-5-2015
Location: The Other Place
Member Is Offline
Mood: Cyclic
|
|
Quote: Originally posted by Sulaiman  |
Before you start, you could check the freezing point temperature to be sure that your glacial is actually 99.9%
|
"Freezing Points of Acetic Acid solutions"
http://askavantor.force.com/articles/FAQ/Freezing-Points-of-...
/CJ
Being well adjusted to a sick society is no measure of one's mental health
|
|
|
draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
Member Is Offline
|
|
U add water to the gaa.talk about spoonfeeding answers
|
|
|
andy1988
Hazard to Others
Posts: 135
Registered: 11-2-2018
Location: NW Americus ([i]in re[/i] Amerigo Vespucci)
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by todo | | Hello everybody,i would like to now, how i can make soliution,1litre 80% acetic acid,from 99.9% glacial acetic acid?thank you |
Other answers are great. Knowledge of the fractional freezing process may help you understand things.
[Edited on 25-9-2018 by andy1988]
|
|
|
nimgoldman
Hazard to Others
Posts: 303
Registered: 11-6-2018
Member Is Offline
|
|
Mix 800 ml glacial acetic acid and 200 ml water.
For more precise dilution, look up the dilution equation.
v1 * c1 = v2 * c2
in your case:
1000 * 0.8 = x * 0.999
x = 800.80 ml
You're welcome.
[Edited on 25-9-2018 by nimgoldman]
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
