Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Egg Membrane
Name: Micheal N. B.
Status: Educator
Age: 50s
Location: N/A
Country: N/A
Date: November 2003

A chicken egg with the shell removed with vinegar is used as semipermeable membrane to demonstrate to students the movement of water by osmosis. In addition to a concentrated sugar and distilled water setup - I would like to include an isotonic setup. If sucrose is used as the solute,

(1) are the sugar molecules large enough not to pass into the egg, and

(2) what percent solution would make for an average isotonic solution.

I'm not sure about sugar, but a 5% salt solution is about isotonic to the inside of a chicken egg. I use 20% salt as a hypertonic solution and distilled water as a hypotonic solution.


Click here to return to the Molecular Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory