November 21, 2024, 04:44:54 AM
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Topic: Measuring Rate of Reaction for Esterification  (Read 317 times)

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Offline Seb

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Measuring Rate of Reaction for Esterification
« on: November 10, 2024, 12:19:29 AM »
I want to perform an experiment that would involve measuring the rate of formation for ethyl acetate (from ethanol and acetic acid) under different acid catalyzed conditions.
I want to know what my options are in terms of methods/equipment that would be able to measure the different concentrations of the solution at different intervals (or to measure aliquots at certain intervals). I am limited by the extent of professional equipment I am able to use, so cheaper (although less accurate) techniques would be preferable. Some potential options below:
- Spectroscopy: Would this work for a colorless solution?
- Chromatography: How can this be quantified into actual numbers?
- Titration: (acid concentration -> amount reacted?)
Appreciate any assistance

Offline rolnor

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Re: Measuring Rate of Reaction for Esterification
« Reply #1 on: November 10, 2024, 02:13:35 AM »

NMR could work, or GC, a little bit problematic that your compounds have a very low boiling point, but this is not totally impossible to overcome.

Offline Borek

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Re: Measuring Rate of Reaction for Esterification
« Reply #2 on: November 10, 2024, 03:32:05 AM »
- Spectroscopy: Would this work for a colorless solution?

IR (or UV). More expensive than visible light hardware.

Quote
- Chromatography: How can this be quantified into actual numbers?

TLC is of no use, but GC should definitely work. Although it won't be cheap.

Quote
- Titration: (acid concentration -> amount reacted?)

Tricky, as you have an excess acid in the mix (catalyst), and if it's concentration is high it can make determining amount of acetic acid impossible. Plus you need to be quick.
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