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Topic: percentage by mass of ethanoic acid in 25ml of vinegar?  (Read 14144 times)

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ntpt

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percentage by mass of ethanoic acid in 25ml of vinegar?
« on: February 21, 2006, 02:51:51 AM »
Does neone know roughly the percentage by mass of ethanoic acid in 25ml of vinegar? My calculations ended up to be 0.22% ....is that way incorrect???
« Last Edit: February 24, 2006, 06:02:19 PM by Mitch »
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Offline pantone159

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Re:vinegar
« Reply #1 on: February 21, 2006, 02:57:18 AM »
Mine says 5%.  I assume this is weight percentage, but I don't know that for sure.
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Offline Borek

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Re:vinegar
« Reply #2 on: February 21, 2006, 03:50:06 AM »
White vinegar here is sold in two varietes - 5% and 10%. Probably w/w although I assume it doesn't make any difference whether it is w/w, w/v or v/v - accuracy of the concentration given on the label is so small that it doesn't matter.

0.22% looks too small to me, 2.2% will not rise a brow.

Show you calculations.
« Last Edit: February 21, 2006, 03:51:18 AM by Borek »
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Offline Alberto_Kravina

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Re:vinegar
« Reply #3 on: February 21, 2006, 08:36:09 AM »
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White vinegar here is sold in two varietes - 5% and 10%.
Be careful-some concentrated vinegar that is sold can have >60% CH3COOH
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Offline Borek

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Re:vinegar
« Reply #4 on: February 21, 2006, 10:16:30 AM »
Quote from: Alberto_Kravina on February 21, 2006, 08:36:09 AM
Be careful-some concentrated vinegar that is sold can have >60% CH3COOH

On the shelf in the hipermarket? I doubt.
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Offline qlabel

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Re:vinegar
« Reply #5 on: February 21, 2006, 10:16:36 AM »
Quote from: Alberto_Kravina on February 21, 2006, 08:36:09 AM
Be careful-some concentrated vinegar that is sold can have >60% CH3COOH
more then 60 % ????
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Offline Alberto_Kravina

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Re:vinegar
« Reply #6 on: February 21, 2006, 10:32:06 AM »
Quote from: Borek on February 21, 2006, 10:16:30 AM
On the shelf in the hipermarket? I doubt.
Maybe you can't find it in Poland, but you can find them-on the shelf of a hipermarket- here in Austria.

See my attach-it says 78-80% (sorry for the picture quality)
« Last Edit: February 21, 2006, 10:32:53 AM by Alberto_Kravina »
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Offline Borek

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Re:vinegar
« Reply #7 on: February 21, 2006, 10:57:44 AM »
Well, I am not discussing with the facts :)

But it is crazy.

Too dangerous for a normal kitchen IMHO.
« Last Edit: February 21, 2006, 12:02:02 PM by Borek »
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Offline Bakegaku

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Re:vinegar
« Reply #8 on: February 21, 2006, 01:32:51 PM »
Hmm... in America vineger is usually somewhere between 3% and 10%.  It would help to see how you got your answer of 0.22%.  

Some types are sold to more professional cooks with upwards of 30%, but nowhere near 60 or 80%.

Why did you lean a Euro by the bottle of vinegar?  at first I thought it was censorship or something, but it's nowhere near the brandname.
« Last Edit: February 21, 2006, 01:33:57 PM by bakegaku »
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Offline Alberto_Kravina

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Re:vinegar
« Reply #9 on: February 21, 2006, 01:40:52 PM »
Quote
Why did you lean a Euro by the bottle of vinegar?  at first I thought it was censorship or something, but it's nowhere near the brandname.
I put it there so that you guys can see how big this bottle actually is
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Offline arnyk

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Re:vinegar
« Reply #10 on: February 24, 2006, 05:56:22 PM »
Glacial acetic acid is pretty close to 100%, at least the stuff I've used before.
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