Sciencemadness Discussion Board

Lead (II) Iodide Demonstrational Video - And Future Ideas?

LifeisElemental - 21-11-2014 at 12:30

https://www.youtube.com/watch?v=iB1oAhRdZIg

Hey guys,

A friend had to film a demonstration video for a media class and we showed the very simple creation of lead (II) iodide. I wanted to share this with you guys and also get feedback on possible demonstrations that are as beautiful or more? He really liked how it turned out and we are planning to make a small series out of this.

Thanks!

Metacelsus - 21-11-2014 at 17:10

"Hangover Helpers" ?

Really?

Nice video, by the way. A future suggestion I have is to distill ethanol from a fermentation mixture, going with the hangover idea.

DrMario - 21-11-2014 at 23:48

Drop the hangover dude, and it's an enjoyable video.

j_sum1 - 22-11-2014 at 00:46

Agreed. I enjoyed MrHomescientist's golden rain video more.
https://www.youtube.com/watch?v=4xSUvSGywXo

LifeisElemental - 22-11-2014 at 04:06

Quote: Originally posted by j_sum1  
Agreed. I enjoyed MrHomescientist's golden rain video more.
https://www.youtube.com/watch?v=4xSUvSGywXo


Certainly agree on that!

Thanks for the feedback guys I agree on the hangover helpers bit as well not my decision and it was only that one video that he decided to call that. Future videos I want to make more educational and let the reaction be the star as it should.

I would like to do the decomposition of nitrogen triiodide and I would like to have my facts straight.

If I was to represent NI3 · NH3 as a Lewis structure how would I go about this? I realize this is likely a complex and am having difficulties finding information online about this.

Help would be very appreciated, thank you guys!

j_sum1 - 22-11-2014 at 04:46

Quote: Originally posted by LifeisElemental  

I would like to do the decomposition of nitrogen triiodide and I would like to have my facts straight.

If I was to represent NI3 · NH3 as a Lewis structure how would I go about this? I realize this is likely a complex and am having difficulties finding information online about this.

Help would be very appreciated, thank you guys!

https://www.youtube.com/watch?v=84cTSgbC5kE

LifeisElemental - 22-11-2014 at 04:57

Quote: Originally posted by j_sum1  

https://www.youtube.com/watch?v=84cTSgbC5kE


Thanks! But it is the NH3 that is confusing me. From wikipedia and a few other sources when the preparation involves iodine dissolved in NH3 the product is referred to as NI3 · NH3.

"The decomposition of NI3 proceeds as follows to give nitrogen gas and iodine: 2 NI3 (s) → N2 (g) + 3 I2 (g) (–290 kJ/mol)However, the dry material is a contact explosive, decomposing approximately as follows:[3] 8 NI3 · NH3 → 5 N2 + 6 NH4I + 9 I2"

It is the NI3 · NH3 I am confused about - do you have any suggestions?

EDIT (After a bit of looking into it):

So this is a coordination complex of NI3 with a NH3 ligand? So NH3 donates electrons to some atom in the molecule? Or maybe the H atoms from NH3 are donated electrons from the I atoms or the N atom in NI3? Is this an actual bond I could show?

EDIT EDIT

Through digging around the internet some more I found my way back to this forum where it is quoted that...
" When you synthesize NI3 from ammonia and KI.I2 solution, you never get pure NI3, but a mixture of NH2I, NHI2 and NI3, commonly referred to as NI3. n NH3."
Is this true? It makes more sense than trying to make a coordination complex out of what seem to be two lewis bases.

EDIT EDIT EDIT

http://books.google.com/books?id=wfJHAAAAQBAJ&pg=PA296&a...

That source seems to conflict with the sciencemadness members that suggested multiple different nitrogen iodides are produced.
[Edited on 22-11-2014 by LifeisElemental]

[Edited on 22-11-2014 by LifeisElemental]

[Edited on 22-11-2014 by LifeisElemental]

[Edited on 22-11-2014 by LifeisElemental]

DrMario - 22-11-2014 at 08:34

Quote: Originally posted by LifeisElemental  

Thanks for the feedback guys I agree on the hangover helpers bit as well not my decision and it was only that one video that he decided to call that.

Are you at liberty to edit the hangover guy out of the video? I do think that, once you remove this "helper", yours is one of the best videos on lead (II) iodide out there. Especially the part where you dissolve the compound to have it recristallize later.

LifeisElemental - 22-11-2014 at 09:32

Quote: Originally posted by DrMario  
Quote: Originally posted by LifeisElemental  

Thanks for the feedback guys I agree on the hangover helpers bit as well not my decision and it was only that one video that he decided to call that.

Are you at liberty to edit the hangover guy out of the video? I do think that, once you remove this "helper", yours is one of the best videos on lead (II) iodide out there. Especially the part where you dissolve the compound to have it recristallize later.


Thanks! My friend (behind the camera) and I, will hopefully someday film this reaction again in a way that highlights the reaction more than a skit.

That is the plan for future videos which is why I have been looking for similar stunning reactions.