From: Paul Doherty (pauld@exploratorium.edu)
Date: Thu Mar 06 2003 - 15:42:35 PST
Message-Id: <l03110769ba8d8d1139c0@[192.168.111.161]> Date: Thu, 6 Mar 2003 15:42:35 -0800 From: Paul Doherty <pauld@exploratorium.edu> Subject: Re: pinhole gummy bears
You do get different rates of water transport in water with different
amounts of salt.
There is not a membrane around the gummy bear, rather there is a gelatin
sugar framework with an interface to water. It still works for osmosis.
Paul D
>I have heard a lot about putting gummy bears in water
>and making them expand. I would like to know why this
>happens. I understand that they are made of gelatin
>and sugar. One source says that water enters the bears
>because of osmosis. I am confused because there is no
>cell membrane, and I was under the assumption that
>osmosis dealt with membranes. What is going on? Also,
>if this osmosis explanation is correct then would you
>get different amounts of expansion in liquids with
>different salt concentrations?
>Ý
>Thanks!
>
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