Chemistry experiment 9 - Cobalt complexes

A solution of cobalt sulfate is added to differenty other solutions. Complexes are formed.

Category:

Science & Technology

Tags:

• chemistry
• experiment
• cobalt
• complex
• precipitate
• solution
• science

[enriqueification]

Nice as the cobalt is being oxidized it changes colors gives a cool cartoon chemestry impression

[derkozten]

@checkzack Because cobalt gets oxidized, and the Co(II) hydroxide becomes Co(III) hydroxide.

I thought Co could be easily oxidized only in ammonia solutions, but it appears that transformation could happen also in presence of OH(-) ions.

[checkzack]

That sodium hydroxide looked like the fluid in a mood ring the way it turned colors. Why did it change so many times?

[Agentoxedo07]

holy-terrorist:>cool chimy *=*

[phj1990]

P.S.

After adding ammonia, you should oxidize Co(II) to it third oxidation state.

It's really hard to oxidize plain Co(II), but with amino ligands it's a different story alltogether.

It shouldn't be too hard to obtain a clear dark red solution, containing the Co(NH3)4(3+) species.

Chemical regards,

Peter

[phj1990]

Hey Koen,

Cool that you're now doing complex chemistry as well.

You may already know that I'm a huge coördination chemistry fan.

Let's spread the word that, despite the fact that pyrotechnic experiments are particularly rewarding, hobby chemistry is much more than that!

Peter Jacobse

[danedaworld]

nice 7th view =D

[Jumpermix]

eey man welke school zit jij ?? :P