March 28, 2024, 04:43:22 AM
Forum Rules: Read This Before Posting


Topic: percentage by mass of ethanoic acid in 25ml of vinegar?  (Read 13103 times)

0 Members and 1 Guest are viewing this topic.

ntpt

  • Guest
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 »

Offline pantone159

  • Mole Herder
  • Chemist
  • Full Member
  • *
  • Posts: 492
  • Mole Snacks: +54/-6
  • Gender: Male
  • A mole of moles doesn't smell so nice...
    • Go Texas Soccer!!
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.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27637
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
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 »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Alberto_Kravina

  • Assault Chemist
  • Retired Staff
  • Full Member
  • *
  • Posts: 608
  • Mole Snacks: +70/-15
Re:vinegar
« Reply #3 on: February 21, 2006, 08:36:09 AM »
Quote
White vinegar here is sold in two varietes - 5% and 10%.
Be careful-some concentrated vinegar that is sold can have >60% CH3COOH

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27637
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re:vinegar
« Reply #4 on: February 21, 2006, 10:16:30 AM »
Be careful-some concentrated vinegar that is sold can have >60% CH3COOH

On the shelf in the hipermarket? I doubt.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline qlabel

  • Regular Member
  • ***
  • Posts: 12
  • Mole Snacks: +2/-2
  • I'm a mole!
Re:vinegar
« Reply #5 on: February 21, 2006, 10:16:36 AM »
Be careful-some concentrated vinegar that is sold can have >60% CH3COOH
more then 60 % ????

Offline Alberto_Kravina

  • Assault Chemist
  • Retired Staff
  • Full Member
  • *
  • Posts: 608
  • Mole Snacks: +70/-15
Re:vinegar
« Reply #6 on: February 21, 2006, 10:32:06 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 »

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27637
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
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 »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Bakegaku

  • Full Member
  • ****
  • Posts: 269
  • Mole Snacks: +20/-5
  • Gender: Male
  • Hydrogen peroxide is my miracle cure to everything
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 »
"True knowledge exists in knowing that you know nothing"
-Socrates

"I see, I forget.  I hear, I remember.  I do, I understand"
-Confucius

"Nothing will benefit human health and increase chances for survival of life on Earth as much as the evolution to a vegetarian diet."
- Albert Einstein?

"American cartoons place characters in situations; anime
places situations around characters.  Anime characters
are not like fictional characters but more like fictional
people; their actions stem directly from their personalities,
and not just as a means to move the story's plot
forward.  We are made to sympathize with them, and
not simply be entertained by them."
~John Oppliger~

Offline Alberto_Kravina

  • Assault Chemist
  • Retired Staff
  • Full Member
  • *
  • Posts: 608
  • Mole Snacks: +70/-15
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

Offline arnyk

  • Regular Member
  • ***
  • Posts: 54
  • Mole Snacks: +4/-3
  • Gender: Male
  • D'oh!
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.

Sponsored Links