todo
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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
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gdflp
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Thread Moved
5-12-2017 at 04:37 |
Sulaiman
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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
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Corrosive Joeseph
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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%
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"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
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draculic acid69
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U add water to the gaa.talk about spoonfeeding answers
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andy1988
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| 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]
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nimgoldman
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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]
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