[neact] Re: potassium chlorate and gummi bear-tsw reply
- From: Ted Wysocki <tswysocki@xxxxxxxxxxx>
- To: <neact@xxxxxxxxxxxxx>
- Date: Sat, 17 Jan 2009 16:30:48 -0500
for safety reasons,...why on Earth are you using KClO3,....when KNO3 could do
as well and at a lower temp with little chance of detonation.
KClO3 releases 3 Oxygens at decomposition where as KNO3 release only
one,....either way you are making a form of gunpowder, and it should be done
behind a polycarbonate Blast Sheild,... a video of the reaction would faster
and safer.
A 50/50 mixture of sugar and KNO3 would do, but DO NOT Grind these two in a
mortar just gently mix them,..... This mixture can be ignited by a Bunsen
Burner or a blow torch on a Burn pad and would show the reaction. A fume hood
is also highly recommended.
Cooking and Pyrotechnics sparked my interest in Chemistry,...hopefully it
will do same for your students.
Hope this helps,
Stay Safe.
Ted.
Date: Sat, 3 Jan 2009 15:06:59 -0500From: djolney@xxxxxxxxxxxxxxxxxx: [neact]
Re: potassium chlorate and gummi bearTo: neact@xxxxxxxxxxxxx
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@xxxxxxxxxxxxxxxxx: Fri, 26 Dec 2008 12:43 pmSubject: [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 * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message to
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