Sciencemadness Discussion Board

making sodium iodate from sodium iodide

symboom - 21-9-2011 at 13:57

using electrolysis of sodium iodide
http://www.youtube.com/watch?v=LGwPfo_eunY
this video shows Electrolysis of Potassium Iodide
and shows iodine being produced iodine does not dissolve in water very well if at all but it does in hydroxide solutions slowly. in the iodine to sodium hydroxide reaction.
-So does the electrolysis of sodium iodide eventually yeild sodium iodate?



[Edited on 21-9-2011 by symboom]

AndersHoveland - 21-9-2011 at 17:48

Or you can just mix bleach, NaOCl, with NaI.

(3)NaOCl + NaI --> (3)NaCl + NaIO3

symboom - 21-9-2011 at 21:07

Quote: Originally posted by AndersHoveland  
Or you can just mix bleach, NaOCl, with NaI.

(3)NaOCl + NaI --> (3)NaCl + NaIO3


why use up bleach i made my own bleach by electrolysis i don't want to use it up.

AndersHoveland - 22-9-2011 at 12:29

or you can just buy the bleach:






It is really quite inexpensive, can be found in your local supermarket, at comes in NaOCl concentrations between 4-9%.

Taylor's bleach is 8-10 % sodium hypochlorite solution, and a 5L container costs only £1.65


[Edited on 22-9-2011 by AndersHoveland]

symboom - 22-9-2011 at 17:06

the bleach i make is really strong it has a greenish yellow color to it and smells really strong it only took two hours to make

UnclearReactor - 24-10-2011 at 20:21

Iodine will redissolve in the Iodide soulution forming the TriIodide I3- anion. That reacts with the NaOH (formed at the other electrode) as follows; I2 + 2NaOH -> NaI + NaIO + H20. If the soultion is warm, The KOI will form NaIO3 and NaI (which will be reused), analagous to the standard Chlorate production. YMMV.

hkparker - 24-10-2011 at 20:33

Iodate can be made from iodine by refluxing with acidified chlorate solution, followed by neutralization. I did a video of this a while back. I was told this same procedure will work with iodide instead of iodine however I cannot confirm that from my own experience.