wHY DOES IT YEILD THIS KIND OF RESULT?
2007-09-17 02:15:21 · 1 answers · asked by mom@oneeight 1 in Science & Mathematics ➔ Chemistry
The molecule of salicylic acid is a hexagon with a -COOH group at the "12 o'clock" position and an -OH group at the "2 o'clock" position. There are three alternating double bonds in the hexagon. This makes salixcylic acid a phenol. Phenolic -OH's form deep purple complexes with Fe3+.
Aspirin is like salicylic acid, but there is a acetate ester group, -OOCCH3, at the "2 o'clock" position. Because there is no phenolic -OH anymore, aspirin should not give the purple solution.
In actual fact, aspirin is constantly hydrolyzing to salicylic acid and acetic acid. Even if you open a "new" bottle of aspirin and sniff, you will smell the vinegar smell of acetic acid. And if you crush a fresh aspirin tablet and add FeCl3 solution, you will get a purple solution. The real world sometimes differs from textbooks.
2007-09-17 03:37:01 · answer #1 · answered by steve_geo1 7 · 1⤊ 0⤋
This Site Might Help You.
RE:
What happens when Aspirin and salicylic acid is treated with Ferric Chloride?
wHY DOES IT YEILD THIS KIND OF RESULT?
2015-08-24 04:58:56 · answer #2 · answered by ? 1 · 0⤊ 0⤋
with asprin, then there should be no reaction as there is no phenol group (-OH attached to a benzene ring) for the iron (III) chloride to react with. However, the phenol group is present in salicylic acid, so a brightly coloured violet-purple colour is seen. still trying to find out the reaction between S.A and the iron chloride though.
as to the last answerer (sp?), the aspirin should hydrolyse back to salicylic acid and acetic anhydride. however, acetic anhydride is so reactive, that the reaction will immediatly reverse again, or it will (more likely) convert back into its original substance acetic ethanoate on contact with water (even water from the air will allow this to happen)
hope that helps
2007-09-20 09:25:15 · answer #3 · answered by a m 2 · 1⤊ 0⤋
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Aspirin, or acetylsalicylic acid (A.S.A.) (IPA: /əˌsɛtɨlsælɨˌsɪlɨk ˈæsɨd/), is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication. Aspirin IS a salicylic acid.
2016-04-10 12:04:46 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Hmmm... Looking at their structures, I don't see anything that should happen...
2007-09-17 02:27:53 · answer #5 · answered by Great_Magician13 2 · 0⤊ 4⤋