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I agree with Carl. It's likely to be more of a concern to presenters than observers. Earl makes some useful suggestions.
C
On Jul 7, 2011, at 4:15 PM, Carl Nelson wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
>
> Isabel,
>
> I can say from experience that adding just a green pea-sized amount of
> Copper (II) Chloride Hydrate to a hydrogen balloon will indeed create a very
> brightly colored green ball of flame when the balloon is ignited. It also
> creates a spray or mist of un-combusted Copper (II) Chloride solid.
>
> I guess the real question would be what are the health effects on the
> presenter doing this? If you're doing it once for a special program, it's
> probably not a big deal. If it's a regular demonstration I wonder about the
> health effects of the inevitable inhaling the copper salt "mist" that is
> generated by the balloon.
>
> Anyone have thoughts on the long term effects or health concerns about this
> kind of demo?
>
> Carl
>
>
>
> On Thu, Jul 7, 2011 at 6:40 PM, Isabel Van Dyke <[log in to unmask]>wrote:
>
>> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
>> Incorporated, a worldwide network of science museums and related
>> institutions.
>>
>> *****************************************************************************
>>
>> Hello all,
>>
>> I'm doing a magic-themed live science show and I want to make blue- or
>> green-tinted fire for "dragon's flame." I'm planning to use cupric chloride
>> or cupric sulfate. I have those two chemicals in solid form, but the MSDS
>> informs me that neither one is flammable as a solid. Thus I need to get
>> them
>> in solution, probably in alcohol (though maybe water would work?).
>>
>> The tricky bit is that rather than sprinkling the copper on an open flame,
>> I
>> want to use it with a hydrogen balloon. I've exploded lots of those, so in
>> and of themselves they aren't a problem, but I'm a bit wary of adding
>> alcohol to the Hindenburg.
>>
>> Can anyone out there let me know the proportion of cupric chloride and/or
>> cupric sulfate to alcohol (isopropyl? ethyl?), and any safety tips? I've
>> seen this done before, so I know it's possible!
>>
>> Thanks,
>> Isabel
>> --
>> Isabel Van Dyke
>> Science Activities Coordinator
>> ScienceWorks Hands-On Museum
>> Ashland, OR
>> [log in to unmask]
>> 541 482 6767, ext. 218
>>
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>
>
> --
> *Carl Nelson*
> Chief Scientist & Exhibits Director
> Imagination Station
> imaginationstationtoledo.org<http://www.imaginationstationtoledo.org/content/imagine-it/>
> 419-244-2674 ext 126
>
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Charles Carlson
Senior Scientist
exploratorium
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