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Topic: How to differentiate ethanoic acid from propanoic acid  (Read 14627 times)

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Offline jjc

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How to differentiate ethanoic acid from propanoic acid
« on: February 07, 2008, 02:55:01 AM »
Hi can anyone suggest a chemical reaction to differentiate ethanoic acid from propanoic acid? it can take place through a couple of reactions? but it must be visible outcomes

THANKS

Offline Kryolith

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #1 on: February 07, 2008, 04:32:26 AM »
Welcome to the forum  :)

Have a look at

http://en.wikipedia.org/wiki/Iodoform_reaction

Offline AWK

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #2 on: February 07, 2008, 06:30:54 AM »
Welcome to the forum  :)

Have a look at

http://en.wikipedia.org/wiki/Iodoform_reaction
Haloform reaction undergo ketones, not acids
AWK

Offline Kryolith

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #3 on: February 08, 2008, 01:06:25 PM »
Haloform reaction undergo ketones, not acids

I know.

Quote from: Wikipedia
Only methyl ketones, or alcohols [or acetaldehyde] with the feature:

    CH3CH(OH)-R

may undergo this reaction.

Hi can anyone suggest a chemical reaction to differentiate ethanoic acid from propanoic acid? it can take place through a couple of reactions? but it must be visible outcomes


Offline ARGOS++

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #4 on: February 08, 2008, 07:17:18 PM »

Dear jjc;

Why not using the simple Ferrichloride-Test (FeCl3) for that?
(Would you like to have a Translation from German, if you can’t find it? )

Good Luck!
                    ARGOS++


Offline AWK

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #5 on: February 11, 2008, 01:59:05 AM »
Quote
Why not using the simple Ferrichloride-Test (FeCl3) for that?
FeCl3 test is devoted for detection of alkanoic acids?
AWK

Offline ARGOS++

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #6 on: February 11, 2008, 08:55:50 AM »

Dear Mr AWK;

Of course!,  ─   That’s very true!

But at the same time the “correct” Ferrichloride-Test empowers you to distinguish between Ethanoic Acid  and Pro-pionic Acid, or more correct between Acetic Acid and “Pionic Acids”.

Apropos:   
In case of nearly pure Samples there is a much easer Test: “Put two Test Tubes” for 2 - 3 hours into the normal Fridge and watch the result.

Good Luck!
                    ARGOS++


Offline jjc

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Re: How to differentiate ethanoic acid from propanoic acid
« Reply #7 on: February 16, 2008, 01:38:00 AM »
Haloform reaction undergo ketones, not acids

I know.

Quote from: Wikipedia
Only methyl ketones, or alcohols [or acetaldehyde] with the feature:

    CH3CH(OH)-R

may undergo this reaction.

Hi can anyone suggest a chemical reaction to differentiate ethanoic acid from propanoic acid? it can take place through a couple of reactions? but it must be visible outcomes



THANKS KROYLITH! i get it already... first you reduce the carboxylic acid and then do the iodoform test... why didn't i think of it! u're a genius thanks much :)

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