hi, bees! help needed!
- is there an (preferably OTC) possibility to titrate a GAA/AA mixture?
- do acetone and AA react?
- can someone describe the smell of AA?
this is what happened until now: ketene was bubbled through commercial acetic acid, volume increased from 200 to 275 ml.
update: the resulting mixture was distilled. unfortunately the experimentator was not able to get clean fractions, so he took 3 broad fractions:
f1: 80°-120° - 170ml
f2: 120-129° - 70ml
f3: 129-140° - 30ml
all 3 fractions did not smell like pure GAA. they all had a sweetish smell somewhat reminding that of ketene itself. f2 and f3 where put in the freezer. f2 froze very fast and melted when taken out of the freezer. f3 did not freeze at all even after a full night in the freezer. no crystals, just a clear liquid.
somewhat disapointing. 30ml AA and not even pure
. from 70ml volume increase you could at least have expected 100ml AA. what happened?
- the acetic acid had big amounts of water?
- during workup acetic acid was destroyed?
- the volume increase stem mainly from distilled acetone?
- acetone reacted wit AA?
whatever it might be, setup v0.2 will definetly contain an acetone trap (like in vogel), consisting of a second set of condensor, 2-neck adapter and rb flask (in an ice bath). the ketene/methane/acetone mixture will enter the top of the condenser and the acetone will condense into the rb flask while the ketene/methane will go out of the second neck of the 2-neck adapter. this is not only necessary because the acetone might be a bitch to get out of the mixture, but this way you can bubble until the volume increases to a fixed value and then know the exact concentration of AA.
the gas will then be piped directly into a flame. it contains methane, so burning should be pretty complete.
if you read until here, what do you think?