Naked Science Forum
Non Life Sciences => Chemistry => Topic started by: scientizscht on 06/03/2019 22:28:32
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Hello!
If you have a solution with ions, can you attract eg cations and fix them on a probe or surface?
How exactly?
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Magnets neither attract nor repel charged particles (though they can exert a force on ions that are already in motion relative to the magnet).
You can attraction ions to a surface by giving the surface the opposite charge of the ions you wish to attract. Or by giving it local dipole moments that can attract ions from a very close range (ie a very polar surface like silica will attract charged species out of a non-polar or slightly polar solvent--but this will attract cations and anions equally)
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"Is it possible to attract ions with magnets?"
Yes... sort of.
can you attract eg cations and fix them on a probe or surface?
No.
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"Is it possible to attract ions with magnets?"
Yes... sort of.
can you attract eg cations and fix them on a probe or surface?
No.
Not sure if you realised, but your both answers are totally opposite to what chiralSPO gave.
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Not sure if you realised, but I cited experimental evidence for one of my claims.
As it happens, the paramagnetic ions in solution in that video are cations.
However, there are also paramagnetic anions.
So, a magnet wouldn't separate them.
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A recent discovery by the Artemis probe orbiting the Moon is that some local magnetism on the Moon deflects ions from the Sun, forming swirls of a different color around a mountain with a local magnetic field.
See: https://www.livescience.com/64928-moon-sunburn-swirls-from-solar-wind.html