ankush - 11-1-2011 at 02:30
originally of violet color when mixed wth powdered silica gel (used in tlc ) obtains a pinkish colr intially then turns red ultimately bown orange
color i dont kno reason for do any body else knows???
ScienceSquirrel - 11-1-2011 at 04:41
Iodine readily forms weak addition / cordination complexes with solvents and other ions, etc.
It is weakly soluble in water but in the presence of iodide it dissolves readily to form a triiodide anion.
http://en.wikipedia.org/wiki/Triiodide
Similary a solution of iodine in alcohol or diethyl ether is brown but a solution in chloroform is purple.
http://en.wikipedia.org/wiki/Iodine#Solubility
ankush - 12-1-2011 at 06:10
thanks got it !!!