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From: Scott Contini (mr_contini@yahoo.com)
Date: Tue Nov 09 2004 - 10:43:05 PST 

Message-ID: <20041109184305.8783.qmail@web80604.mail.yahoo.com>
Date: Tue, 9 Nov 2004 10:43:05 -0800 (PST)
From: Scott Contini <mr_contini@yahoo.com>
Subject: Back to Explosive Bubbles

I think I just need to ask this question more clearly.

What is the cheapest/easiest chemical reaction that
will produce Hydrogen?

What is the cheapest/easiest chemical reaction that
will produce Oxygen?

1. This reaction in a flask with a blow-off tube will
produce soap bubbles of the reaction gas in a tray.

2. Bubbles of both types of gases will intermix in
the tray.

3. A volunteer is chosen from the crowd.

4. Demonstrator and volunteer put in EARPLUGS.

5. Demonstrator has volunteer scoop up a handful of
bubbles and extend hands outward.

6. Demonstrator ignites bubbles, producing a very loud
BANG. No harm comes to Demonstrator or Volunteer.

I have done this DEMO with a bunch of teachers before.
 It is totally harmless and lots of fun! I just need
to know about cheap and easy ways of isolating the
gases so I do not bankrupt my science department.

Hope this clears my question some,

Scott Contini
mr_contini@sci-con.com

                
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