How Can You Measure the Charge of a Molecule?

[chusifer]

so...i have some crazy engineering problem. anyway, part of the problem is how do i measure the charge of a molecule? i need to find the force, F = qE. i kno the electric field i am applying, but how can i physically measure the charge of the molecule? some people thought of using HPLC (high pressure liquid chromatography) which would allow for a comparison of charge against a known molecule. but...im just wondering if there's any other way to do it. thanks

 

[Andrew Mason]

so...i have some crazy engineering problem. anyway, part of the problem is how do i measure the charge of a molecule? i need to find the force, F = qE. i kno the electric field i am applying, but how can i physically measure the charge of the molecule? some people thought of using HPLC (high pressure liquid chromatography) which would allow for a comparison of charge against a known molecule. but...im just wondering if there's any other way to do it. thanks

You haven't stated the problem clearly. Are you talking about a dipole molecule (like water)? Since molecules are normally electrically neutral your question doesn't make much sense.

AM

 

[wais]

There are a few different methods that can be used to measure the charge of a molecule. One common method is to use electrophoresis, which involves applying an electric field to a sample containing the molecule and measuring the movement of the molecule in response to the field. This can give an indication of the charge on the molecule.

Another approach is to use mass spectrometry, which can provide information about the mass and charge of a molecule. By comparing the mass and charge of a molecule to a known standard, the charge of the molecule can be determined.

Other techniques that can be used to measure the charge of a molecule include capillary electrophoresis, nuclear magnetic resonance (NMR) spectroscopy, and ion-selective electrodes. Each of these methods has its own advantages and limitations, so it may be helpful to consult with a specialist in the field or do some research to determine the best approach for your specific problem.

Overall, there are various techniques that can be used to measure the charge of a molecule, and the best approach will depend on the specific requirements of your engineering problem. It may be helpful to consult with colleagues or experts in the field to determine the most appropriate method for your situation.