[neact] Re: potassium chlorate and gummi bear
- From: Jerusha Vogel <jj@xxxxxxxx>
- To: neact@xxxxxxxxxxxxx
- Date: Sat, 03 Jan 2009 20:51:16 -0500
I agree with all the comments posted about safety – I also had a colleague burn
her hand on this demo – but I still love to do it. The kids LOVE it and you
just don’t get the same reaction from a video. I personally have never had any
problem with it. However, take your time and set it up carefully. You don’t
need a lot of potassium chlorate to make a great flame out, and if you do it in
a hood with the kids looking on from the other side, and wear a glove I think
it is safe enough. I have the test tube attached to a clamp on a stand,
pointing at a 45 degree angle towards the side wall of the hood. As the Bunsen
burner decomposes the chlorate, it becomes liquid and the white smoke moves up
the tube. This is the best time to drop in the gummy. I also enjoy pointing
out the bright purple color of the flame that is a result of the excited
electrons in the potassium. You can see it much better in this than in the
traditional flame tests.
Good luck.
Jerusha Vogel
From: neact-bounce@xxxxxxxxxxxxx [mailto:neact-bounce@xxxxxxxxxxxxx] On Behalf
Of nancyjeanward@xxxxxxx
Sent: Friday, January 02, 2009 10:54 PM
To: neact@xxxxxxxxxxxxx
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
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * To post a message to the NEACT list, send an email to
neact@xxxxxxxxxxxxx To unsubscribe, send an email message to
neact-request@xxxxxxxxxxxxx with ‘unsubscribe’ [without the quotes] in the
subject field. You may also unsubscribe via the web interface at
//www.freelists.org/list/neact . Help with the system may be obtained at
//www.freelists.org/help Archived messages may be accessed at
//www.freelists.org/archives/neact “Digest” mode: Subscribers may set a
flag to this effect, whereby all messages during a given day will arrive at the
end of the day as one email message. Please see the Freelists.org help files,
or log on to the web portal for instructions.
“Vacation” flag: It is also possible to set this option, which will cause
messages to not be delivered for the length of time that you specify. Here too,
please see the Freelists.org help files, or log on to the web portal for
instructions.
Moderator: The moderator of this list is Steve Stepenuck, whose contact
information is on the NEACT website at http://www.neact.org/list_service.
Please contact him if you encounter any problems subscribing to or using this
list. Thank you.
_____
Get a free MP3 every day with the Spinner.com Toolbar. Get
<http://toolbar.aol.com/spinner/download.html?ncid=emlweusdown00000020> it
Now.
Other related posts:
