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Previous by Date: Subject: Re: [DCHAS-L] "Hydrogen pop" demo and PPE Date: Tuesday, December 29, 2020 at 1:23:03 PM Author: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU> |
Next by Date: Subject: Re: [DCHAS-L] "Hydrogen pop" demo and PPE Date: Tue, 29 Dec 2020 18:31:22 +0000 Author: Edward Movitz |
I agree with the test tube tongs, definitely. It would also have been a good idea to wear gloves, preferably flame retardant. The neck certainly isn't constricted, so the (incompletely) combusted gas should be pushed out of the tube, and
I'm guessing that will be the outcome in almost every case. The assumption here is that the test tube has no cracks or weaknesses of any sort, and that one does not generate a stoichiometric amount of hydrogen equal to one half the amount of oxygen present
(think back to the H2, O2, H2 + O2 balloon experiments that were often used in general chemistry classes a generation ago). The reaction that is generating the hydrogen is not described, but there are plenty online to look for (metal + HCl, for example).
This should be done with a blast shield present. From a safety perspective this is not done well. I worry that others will try to copy this without thinking through all of the safety issues (HCL splash back could be one, for example, and, again, no gloves).
If this were done with proper respect for safety it would be a nice picture, but as it is it can prompt people to be careless.
From:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> on behalf of "'sigmannsb**At_Symbol_Here**appstate. edu'" <sigmannsb**At_Symbol_Here**APPSTATE.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Date: Tuesday, December 29, 2020 at 11:26 AM
To: "DCHAS-L**At_Symbol_Here**Princeton.EDU" <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Subject: Re: [DCHAS-L] [External] [DCHAS-L] "Hydrogen pop" demo and PPE
I think that test tube tongs should be being used.
S-
On 12/29/2020 12:05 PM, Kemsley, Jyllian wrote:
Hi all--I'd appreciate any thoughts on someone wearing just eye protection for this demo. On the one hand, it's a small amount and the test tubes don't have constricted necks. On the other hand, it looks like a glass tube held in bare hands near the face.
https://twitter.com/I_am_Endeavour/status/1340788101283803140
It's been suggested as something to post in C&EN's "Chemistry in Pictures" collection for New Year's Eve, and I need to decide by tomorrow (Wednesday 12/30) whether to go ahead.
Thanks for your input!
Jyllian
Jyllian Kemsley, PhD [she/her/hers]
Executive Editor, policy and content partnerships
Chemical & Engineering News
M: (+1) 925-519-6681 | Skype: jyllian.kemsley
Twitter: **At_Symbol_Here**jkemsley
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