In general, to make a "strong gelatin solution", purchase a couple of boxes
of unflavored powdered gelatin at the grocery store. You'll find it near the
little boxes of Jello. The preparation instructions are on the box. Since
you're not going to eat it, you can leave out the sugar. To make a strong
solution, either double the recommended amount of powder or cut the amount
of water in half.
If the book is unclear about the amounts of universal indicator, it may be
because the amounts are not critical. If the "universal indicator" consists
of food, such as boiled cabbage or beet juice, just use your (or a friend's)
cooking instincts. You can make it fairly concentrated, then dilute it as
necessary. This is one of the things to try out for yourself in the kitchen
before trying it in the classroom. A Web search for "Kitchen chemistry" may
be fruitful.
Vickie
-----Original Message-----
From: Tina Fanetti [mailto:FanettT@WITCC.COM]
Sent: Tuesday, February 11, 2003 10:28 AM
To: PHYS-L@lists.nau.edu
Subject: Electric Rainbow Jelly
Happy Tuesday.
Has anyone here tried to make the electric rainbow jelly in Neil Down=
ie's book Vacuum Bazookas, Electric Rainbow Jelly and 27 other Saturd=
ay science projects?
I am trying to make it and his directions are not too clear. He says=
to make a strong gelatin solution...what is a strong gelatin solutio=
n?
How much universal indicator am I supposed to boil up with how much w=
ater?
So if you have done this I would appreciate any help
Thanks
Tina
Tina Fanetti
Physics Instructor
Western Iowa Technical Community College
4647 Stone Ave
Sioux City IA 51102
712-274-8733 ext 1429
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