Sciencemadness Discussion Board
Not logged in [Login ]
Search the forums Search   Frequently Asked Questions FAQ   View member list Member List   Today's Posts Today's Posts   Forum Stats Stats Back to: sciencemadness.org
Sciencemadness Discussion Board » Fundamentals » Chemistry in General » iodine colors in silica gel Go To Bottom

Printable Version  
Author: Subject: iodine colors in silica gel
ankush
Harmless
*



Posts: 2
Registered: 11-1-2011
Member Is Offline

Mood: No Mood

[*] posted on 11-1-2011 at 02:30
iodine colors in silica gel


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???
View user's profile View All Posts By User
ScienceSquirrel
International Hazard
*****



Posts: 1863
Registered: 18-6-2008
Location: Brittany
Member Is Offline

Mood: Dogs are pets but cats are little furry humans with four feet and self determination! :(

[*] posted on 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
View user's profile View All Posts By User
ankush
Harmless
*



Posts: 2
Registered: 11-1-2011
Member Is Offline

Mood: No Mood

[*] posted on 12-1-2011 at 06:10


thanks got it !!!
View user's profile View All Posts By User

 Sciencemadness Discussion Board » Fundamentals » Chemistry in General » iodine colors in silica gel   Go To Top