Decolorization of Iodine Solution by Match Heads
Chemistry fun experiment students will learn and enjoy the Decolorization Iodine Solution by Match Heads.
Materials & Tools
A Bottle of Water, Iodine Tincture, Straw, Jam Bottle with Lid, Metal Wire, Scotch Tape, Scissors, Match Sticks
Add5-6 drops of iodine tincture to the water till it becomes brown. Mix well
Make a bunch of 6-7 match sticks around the metal wire.
1st: Twist the wire doubly
2nd: Attach a match stick to the wire
3rd: Tie other match sticks a little below to the central match stick. Complete! Pour the dilute iodine solution into the jam bottle. Burn the central match sticks and let the other match sticks burn in the jam bottle completely. Close the bottle immediately and swirl it.
Observe! The brown color of iodine has vanished away!
Match heads contain sulpher and produce SO2 when they burn.Match head contain sulpher and produce SO2 then they burn So2 forms sulphurous acid with water which is a reducing agent lodine solution has brown clor in oxidized form. when it reacts with H2So3 Oxidation-reduction reaction takes place.Iodine is reduced to form hydrogen iodide and decolorized.