bismuthate
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Old Nassau Reaction Variation
So Halloween is coming up. A great reaction for Halloween is the Old Nassau Reaction also Know as the Halloween clock reaction.
http://www.youtube.com/watch?v=Tv6_IsdnaGg
So cutting to the point:
Mercury sucks. Who likes using mercury salts? They're a pain!
So why don't we use Bismuth nitrate and any alkaloid? (my tap water contains some so yours might too) It should work to the same effect as mercury
salts.
I would try it myself but my lab is shut down.
am I missing anything or will this work?
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Brain&Force
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Well, someone would have to try it. The kinetics may vary immensely.
At the end of the day, simulating atoms doesn't beat working with the real things...
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Jylliana92
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I'm wondering... what if I do the classic iodine clock reaction, with orange food coloring... so that the colorless solution will be orange. I'm sure
the black starch complex is much stronger so you won't see the orange when it's black..
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bismuthate
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Yup the iodine starch complex is incredibly dark. You couldn't see the food coloring.
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Brain&Force
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The Old Nassau, though, "clocks" orange, then black. Similarly, the Briggs-Rauscher clocks brown, then black, then clear again.
At the end of the day, simulating atoms doesn't beat working with the real things...
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Arcuritech
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Quote: Originally posted by Jylliana92  | | I'm wondering... what if I do the classic iodine clock reaction, with orange food coloring... so that the colorless solution will be orange. I'm sure
the black starch complex is much stronger so you won't see the orange when it's black.. |
You would need an orange dye that won't react or form a complex with any of the many components of the iodine clock mixture.
Such an organic dye seems unlikely to exist on account of the fact that the strong colors in dyes usually originate from lots of double bonds which
the iodine, iodate*, and thiosulfate could all react with.
Using a very finely powdered highly insoluble (likely inorganic) dye should solve this problem at the expense of the clarity of the start solution -
the powdered suspension would render the otherwise clear solution a translucent orange, while the final solution should retain its black color.
*edit to add iodate
[Edited on 2014-10-25 by Arcuritech]
"If we knew what we were doing, it wouldn't be called research." -Albert Einstein
"There are few things -- whether in the outward world, or, to a certain depth, in the invisible sphere of thought -- few things hidden from the man
who devotes himself earnestly and unreservedly to the solution of a mystery." -Nathaniel Hawthorne ("Roger Chillingworth")
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