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Q: How is a positive test for phenols using ferric chloride recognized?
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What is the mechanism of ferric chloride test?

reaction and meachanism of neutral feric chloride with phenols


Why acetoacetic ester gives ferric chloride test?

acetoacetic aster gives ferric chloride test which is a typical test for phenols?


Why ferric chloride test is not used to identify alcohols?

Because it's a test for phenols or enols. Please see the link.


How do you prepare neural ferric chloride solution?

The ferric chloride test is used to determine the presence or absence of phenols in a given sample. Enols give positive results as well. The bromine test is useful to confirm the result, although modern spectroscopic techniques (e.g. NMR and IR spectroscopy) are far superior in determining the identity of the unknown. The quantity of total phenols may be spectroscopically determined by the Folin-Ciocalteau assay.


Is vanillin positive in a ferric chloride test?

yes


What is the pH value of ferric chloride?

The ferric chloride solution is acidic.


Why would vanillin test positive in a ferric chloride test?

It would test positive because there is a phenol group in vanillin.


What is the composition of ferric chloride?

Ferric chloride contains the elements iron and chlorine.


Lab preparation of neutral ferric chloride solution from solid ferric chloride?

I think neutral ferric chloride is prepared by mixing iron(III) chloride with ammonium hydroxide.


Is ferric sodium chloride a mixture or not?

Ferric sodium chloride (Na3ClFe) is a compound not a mixture.


What type of compound is ferric chloride?

Ferric chloride is an ionic compound (and is classified as a salt).


2 Why does aspirin not give a positive ferric chloride test as salicylic acid does?

Because aspirin does not contain OH group like salicyclic acid so ferric chloride preferes to react with a compounds that have OH group.