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Non Life Sciences => Chemistry => Topic started by: scientizscht on 01/12/2023 22:59:00

Title: Are there gel-like and solid-like materials with high diffusivity?
Post by: scientizscht on 01/12/2023 22:59:00

Hello!

Are there gel-like and solid-like materials that when they touch (or be immersed into) a water solution, will allow solutes from the water solution to migrate and diffuse into them?

Thanks!

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: Bored chemist on 02/12/2023 00:26:32

Toast?

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: scientizscht on 03/12/2023 02:15:18

Thanks but I think you confuse absorption with diffusion?

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: paul cotter on 03/12/2023 09:23:03

Toast will allow diffusion of solvents and ions but BC should have said "unbuttered toast".

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: Bored chemist on 03/12/2023 12:23:51

Quote from: scientizscht on 03/12/2023 02:15:18

Thanks but I think you confuse absorption with diffusion?

Nope, I understand the difference.

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: alancalverd on 03/12/2023 16:35:35

The answer is "probably not", though you can use mercury to extract some metals from mixtures. However you can separate solute from solvent in small quantities by chromatography - the solvent diffuses more quickly than the solute and leaves behind an increasing concentration of solute.

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: paul cotter on 04/12/2023 17:55:01

Well then how about burnt toast? The resultant pyrolytic graphite might just do the job.

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: Zer0 on 04/12/2023 19:47:38

@OP

This is gonna sound stoopid, i know, but still...

Candy Floss!

Also, the Temperature (t) Difference between the Solute & Solvent seems Paramount to me personally.

ps - how bout droppin an ice cube into boiling water?

Title: Re: Are there gel-like and solid-like materials with high diffusivity?
Post by: Bored chemist on 04/12/2023 20:13:48

If the OP had asked a better question then things like ion exchangers and this
https://en.wikipedia.org/wiki/Molecular_imprinting
Might be better answers- but he didn't.