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Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: scientizscht on 20/06/2020 12:10:29

Title: How does electric diffusion defers from concentration diffusion?
Post by: scientizscht on 20/06/2020 12:10:29

Hello

If we have two ionic solutions of different concentration separated by a semipermeable membrane, there will be a flow through the membrane due to the concentration difference.

At the same time, that flow will create a charge difference between the solutions which will create an opposite flow through the membrane due to the electric charge difference.

How can these be calculated? Which is normally strongest? E.g. does it take a high concentration difference to overcome the diffusion due to a small electric charge difference or vice versa?
What is the ratio?

Thanks

Title: Re: How does electric diffusion defers from concentration diffusion?
Post by: Bored chemist on 20/06/2020 12:42:29

What does your semipermeable membrane let through?

Title: Re: How does electric diffusion defers from concentration diffusion?
Post by: scientizscht on 20/06/2020 14:27:23

Quote from: Bored chemist on 20/06/2020 12:42:29

What does your semipermeable membrane let through?

A particular ion from the solute of the solutions.