[Munfred]

Hi

Recently I asked my teacher if the products of aqueous electrolysis of KI, if it would be KOH and I₂. She didn't know it right away, but a little after that she told me it would be KOH and KI₃ because KI and I₂ in aqueous solution form KI₃.

I got a bit like what the? And asked her if fluorine, chlorine or anything like that could do the same. She said that no, and wasn't sure if KI₃ would be a stable molecule if the solution was dried up.

I searched for the process she mentioned that occurred on KI₃ at wikipedia (I'm Brazilian so it's called complexação, and according to wikipedia in english it's polyatomic ions, I'm pretty much sure that's right).

I now ask you: why that happens? Why can't other halogens do the same? And is KI₃ just an ion or it can form a stable molecule?

Thanks

[AWK]

This is a quite complicated problem. On the college level treat it as an exclusion.

May be this link help you a bit
http://chemphys.marian.edu/symposium06/RMMacraeADJohnsonPRES.pdf

[Munfred]

Yeah, I thought so... well thanks for the link I took a look at it, and altought I didn't understand 90% of it it made me  want to learn more...I'll try finding a graduation chemistry book

Thanks again