Fantasma4500
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KIO4 from KClO3?
just happened to come by this, and as i have seen KIO4 with sugar before i couldnt help but get slightly excited over this find..
https://www.youtube.com/watch?v=5eudzQk9vXs&list=UUvzQQS...
basically the chemistry as shown in this video is as following
KClO3 + KI --> KIO3 + KCl
he generates the KClO3 from Cl2 + KOH
Cl2 from Ca(ClO)2 + HCl
thereafter he turns the KIO3 into KIO4 by following equation
Cl2 + KIO3 + 2KOH --> KIO4 + H2O + 2KCl
the solution is then cooled down to have all the KIO4 settling out
KIO3 100 mL @ 0*C = 4.6g
KIO4 100 mL @ 0*C = 0.17g
now... this would be possible with bromates and perbromates aswell, wouldnt it??
i mean KIO4 and KBrO4 are fairly exotic oxidizers....
https://www.youtube.com/watch?v=K0XTgRvAqzQ
not to mention the iodine clock which has probably been high on the list of things to do before hitting the grave for many of us
i suppose that as iodine is often pretty horrible on plastic and many electrolytic cells has at least some plastic parts it would be a very
interesting route to KIO3 and especially KIO4, if that is even possible with simple MMO anode??
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bismuthate
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Well, perbromates are very hard to make so I doubt this will work. They are much stronger oxidizers than any other oxyhalogens.
Also there are many easier ways to make an iodine clock reaction.
Here is the experiment that I believe elementguy27 based his experiment off of. http://woelen.homescience.net/science/chem/exps/KIO4_synth/i...
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Fantasma4500
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yes, i was just reminded about the synthesis of perbromate yesterday, and it involves xenoncompounds and fluorine and .. along that road
bromate might be possible
the thing is just that using simple chlorate for making something like periodate
it could seem as if he might have looked at woelens experiment, perhaps its just coincidence?
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woelen
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You do not even need chlorate to make periodate, you just need iodide, hydroxide and chlorine gas. The chlorine gas can be made in many different
ways. I used swimming pool chlorinator (TCCA) and dilute HCl for making Cl2.
Making perbromate is beyond the reach of amateur chemists. It is not an extremely strong oxidizer (surprizingly, it even is quite inert and does not
easily react in aqueous solution, although its dry salts are good oxidizers, a little bit more reactive than perchlorates, but much less reactive than
chlorates, bromates, iodates and periodates). The reason that making it is so difficult is a mechanistic one. There is no known easy path towards
perbromate from bromate, bromide or other known simple reactant. However, once the perbromate is formed, it is remarkably stable.
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Fantasma4500
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yes i did see that, but if you can just scoop chlorates out of a electrolytic cell then its pretty easy, as long as you dont consider the costs of KI,
because that isnt really cheap
i would say also that there wouldnt be much problems with chlorine either, so using a chlorate in excess would be damn clean, and VERY easy if using
sodium chlorate
the next step involves chlorine however, but limited need of chlorine is always a great thing
by some means, wouldnt this imply that KIO3 in a electrolytic cell could be made into KIO4 as chlorine is present and also a base somewhat?
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Fantasma4500
International Hazard
Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
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after having tried NaClO3 with KI and seeing there was pretty much no reaction i had to go ahead and make some KOH
thereafter i set up for chlorination of KOH + KI solution
it was quite problematic because of several reasons and it ended up catastrophically failing
i decided to add the TCCA to my chlorine generating flask and attach PVC hose to ground glass hose adaptor
thereafter adding diluted HCl
clouds of chlorine surely existed and on several occasions i felt a hot cloud of chlorine rolling over my hand
when i was about done doing this all the KOH and KI solution was sucked into my chlorine generator flask out of nowhere leaving me with a thick white
mush of chemistry very well mixed up
i guess electrolysis of KCl could be done instead of KOH + Cl2, alot easier aswell, without seemingly breaking physics
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