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Topic: Reaction changing magnetic properties  (Read 5233 times)

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Offline pawelkkk1

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Reaction changing magnetic properties
« on: April 07, 2008, 10:15:13 PM »
Do you know any chemical reaction after which magnetic properties of compound change?

Offline Rabn

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Re: Reaction changing magnetic properties
« Reply #1 on: April 07, 2008, 10:22:47 PM »
reduction or oxidation of iron would change the magnetic properties of the compund. i.e oxidation of Fe(s) to Fe2O3.  If I remember correctly the magnetic ability of iron is reflective of its half full d shell electrons' spins in alignment.

Offline pawelkkk1

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Re: Reaction changing magnetic properties
« Reply #2 on: April 07, 2008, 10:42:29 PM »
Wow, that was fast! :) I posted it 5 mins ago :)

And would it be possible to exhange oxygen with calcium? Im looking for compounds to selectively react with calcium and become magnetic.

Thanks you for reply.

Offline Rabn

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Re: Reaction changing magnetic properties
« Reply #3 on: April 07, 2008, 10:56:55 PM »
How much chemistry do you know? Curious after that last question.  You could probably reduce the iron oxide back to solid iron. You would have to check a reduction table.

Offline pawelkkk1

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Re: Reaction changing magnetic properties
« Reply #4 on: April 07, 2008, 11:39:55 PM »
Im after studies in physics and there is not much overlap usally between those subjects at university. So I have bit problem with formulating my question.

I'm trying to find some form (liquid preferably) of calcium detector. That is, if there is calcium around - it becomes magnetic.

 

Offline Rabn

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Re: Reaction changing magnetic properties
« Reply #5 on: April 08, 2008, 12:15:45 AM »
Calcium specific detectors are available in a form very similar to an electronic pH measuring device. http://www.vernier.com/probes/ca-bta.html is an example. 

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