[neact] Re: potassium chlorate and gummi bear

A variation I used many years ago was to heat KClO3 (to a depth of 1/2 inch or 
so) in an ignition tube, until it just melts. (Have the tube mounted quite 
vertically). Then deliberately turn off the burner, count down 5-4-3-2-1, and 
drop an UNLIT wooden spint into the tube. As Cary relates, it burns violently, 
even as 2nd and 3rd do. I labelled it "what if I didn't DIDN'T use a 
catalyst?!", referring to the classic O2 gas preparation. I guess the use of 
MnO2 there makes the gas production go with less heat needed, so promotes 
safety. And the kid that's most obnoxious that day gets the job of washing out 
the tube when things have cooled down !
   But I think in this day and age I'd not do the demo live with students 
about, especially using sugar like in a gummi bear, for all the reasons others 
have cited already.  A better bet would be to do it on camera and show the tape 
when desired.
  ----- Original Message ----- 
  From: nancyjeanward@xxxxxxx 
  To: neact@xxxxxxxxxxxxx 
  Sent: Friday, January 02, 2009 10:54 PM
  Subject: [neact] potassium chlorate and gummi bear



  Hello.  I am contemplating doing a demo with  gummi bear and potassium 
chlorate; however, I am a bit chicken.  Could you give me any info on this?  
Has any one done this? 
  Thanks,
  Nancy Ward

  -----Original Message-----
  From: Kenneth W. Brody <kwbrody@xxxxxxx>
  To: neact@xxxxxxxxxxxxx
  Sent: Fri, 26 Dec 2008 12:43 pm
  Subject: [neact] hope to see you


  I apologize for this listing: I usually read the notices I read with a more 
critical eye before sending them to the list-serve. I guess the holiday season 
highs made me miss this. The response I got indicates how shop you guys are. 
   
  Sorry, and Happy New Year. 
   
  Ken 
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