Egg-speriment

More "osmosis and diffusion."

This lab uses raw eggs as a model for the cell.

First, we put the eggs into vinegar. The vinegar is a weak acid which dissolves the calcium in the egg shells and exposes the membrane.

Now that we have eggs without their shells, we've been cycling them through a variety of solutions to see if we can understand the mechanisms of diffusion across the semi-permeable membrane. So far, we've had our eggs in vinegar, water, salt water, and corn syrup.

We're not done yet. Our eggs have a few more transitions to go.

Many thanks to all the parents who donated supplies to help us with this lab.