Aluminum iodine reaction ? Science Toys | Science Blog | Log Out | Topics | Search
My Toys | Energy | Moderators | Register | Edit Profile

Scitoys Message Board » I want you to add a new chemical to your "Ingredients" book. » Aluminum iodine reaction ? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

anonymous
Posted on Sunday, April 4, 2004 - 5:05 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

For a chemistry demonstration, I want to do the reaction of powdered aluminum and ground iodine. I can make the similar reaction work with zinc (powdered zinc + ground iodine, a couple drops of water as a catalyst. Purple cloud of sublimed iodine results), but I can't make the aluminum work. I can't figure out why the zinc would work and the aluminum would not: aluminum is more reactive. I've been doing the two experiments exactly the same (changing only the type of metal). The aluminum reaction is supposed to be stronger than the zinc one, even producing a flame.

Any hints?
Top of pagePrevious messageNext messageBottom of page Link to this message

Arthur Urovski
Posted on Saturday, May 15, 2004 - 10:40 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

From school days I remember that alluminum has a thin layer of aluminum oxide on the surface that prevents it (inhibits) from being extremely reactive.I have not tried it myself, but if a piece of alluminum was submerged in mercury (remember that mercury is poison and need good ventilation to keep vapors in check)and then scraped the surface with something sharp, murcury and alluminum will bond, after that alluminum exposed to water or air or other elements will be able to produce significant chemical reaction. Mercury can be found inside of some thermostats and thermometers. Hope it helps. Safety first.
A.U.

Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action:
For those who have trouble spelling, the Google Toolbar (included in the Google Pack) can check and correct the spelling in your posts on this message board and others.

Renewable Energy

Topics | Last Day | Last Week | Tree View | Search | Help/Instructions | Program Credits Administration