neptunium - 4-1-2012 at 20:02
i have this solution of iodine contaminated with small amount of hydrogen peroxide ...its interefering with a bunch of reaction and i cant use with
starch...
how to i get rid of H2O2 and not the I2?, heating it is not an option
hkparker - 4-1-2012 at 20:08
Why is heating not an option, do you not have a hotplate? The easiest way would be to dry it back to iodine probably.
You can also decompose the H2O2 into water and oxygen. Manganese dioxide would work but then you would have MnO2 contamination. This could be
removed by filtering however.
Silver should also work to decompose the H2O2 if manganese dioxide is not available. This might take longer, but will not leave contamination.
neptunium - 4-1-2012 at 20:12
i dont have any silver but i like the MnO2 idea!!!i`ll filter it off ..
Thanks hk!
Neil - 4-1-2012 at 21:37
add a little bit oh KOH to get KI and it will chew up any peroxide with joy.
[Edited on 5-1-2012 by Neil]
hkparker - 4-1-2012 at 23:24
KI will make short work of H2O2 as well, didn't think of that, good idea. And no problem!
rstar - 5-1-2012 at 05:04
How about adding CaSO3 to it ?
CaSO4 shall be formed in reaction with H2O2 and CaSO3. It can too be filtered off.
But BaSO3 shall be better, if you have access to it. 
neptunium - 5-1-2012 at 14:16
i wish!