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Subject: Re: [DCHAS-L] "safe" barking dog demo
Date: Thursday, April 28, 2016 6:52:43 PM
Author: Patrick A Ceas <ceas**At_Symbol_Here**STOLAF.EDU> 		Next by Date:
Subject: [DCHAS-L] Chemical Safety headlines from Google (15 articles)
Date: Fri, 29 Apr 2016 07:02:51 -0400
Author: "Secretary, ACS Division of Chemical Health and Safety"

From: "Wilhelm, Monique" <mwilhelm**At_Symbol_Here**UMFLINT.EDU>
Subject: Re: [DCHAS-L] "safe" barking dog demo
Date: Fri, 29 Apr 2016 00:59:55 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 1109037139E1524980CF9CBEB24766180103F0BBCD**At_Symbol_Here**UMF-EX10EMB1.umflint.edu
In-Reply-To


Hi Pat,

 

I would say that, YES, this one is just as bad with what can go wrong.  I refer to it not as a Barking Dog demo, but as the Whoosh Bottle demo.  I do not nor ever would I do it as described in either one of the links you have given.  See an example of one of many things that can go wrong here and you will understand: https://www.youtube.com/watch?v=yYj0U9AMBZc.   I would NEVER do this at a grade school as I would not be able to meet all of my safety precautions in such a setting. 

 

Best,

Monique Wilhelm

Laboratory Manager/Adjunct Lecturer/Chem Club Co-Advisor

Department of Chemistry & Biochemistry

University of Michigan-Flint

Flint, MI 48502

 

 

 

 

From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu] On Behalf Of Patrick A Ceas
Sent: Wednesday, April 27, 2016 3:11 PM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] "safe" barking dog demo

 

Just a quick yes or no, please.  Would you lump the "Safe Barking Dog Demo" in the same category as the Rainbow Demo & Tornado Demo (i.e., it is an open flame demo, where additional flammable fuel -- let's say 95% ethanol -- could be added to an already confined ignited situation, therefore it is not prudent to perform, especially at a local grade school).  We are having a discussion about it.

 

Here are two links that show/explain it:

https://www.youtube.com/watch?v=6U56gVbcb4Q   

 

http://chemistry.about.com/od/funfireprojects/a/Fire-In-A-Bottle-Barking-Dog-Chemistry-Demonstration-Alternative.htm

 

Thanks.

 

Pat

 

--

Patrick A. Ceas, Ph.D.

Chemical Hygiene Officer
312 Regents Hall of Natural Sciences
St. Olaf College
Northfield, MN 55057
507-786-3560 (o)
507-321-0379 (c)

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