Where did the shell go? That’s an egg-cellent question!
DIY Osmosis Eggs are a great way to show your kids how osmosis works. What is osmosis? It is the movement of water from a less concentrated solution to a more concentrated solution through a partially permeable membrane.
Lindsay Jones, Director of Stevenson University’s Science Camp showed us this eggcellent eggsperiment. Take a look at how colorful those eggs are!
DIY Osmosis Egg
- Food Coloring
Make a naked egg! Soak an egg in vinegar for several days. (2 days should be enough!) Be sure to keep the egg at room temperature and you may want to add more vinegar after one day. The vinegar will slowly react with the shell and dissolve it.
Color the egg. Put water in a bowl with food coloring (you can also use a plastic baggie). Add the shell-less egg. The food coloring and water will travel into the egg, giving it color. This is called osmosis.
Achieve equilibrium. In a new bowl, add water. Put the colored egg into water. Some of the food coloring will diffuse back into the water to reach equilibrium.
About Our Sponsor
This article is sponsored by Stevenson University’s Science Camp! Students attending Science Camp at Stevenson University engage in exciting laboratory-based, hands-on activities designed to instill and enhance interest in science. Topics range from robotics to real-world chemistry and biology. All activities are taught by Stevenson University faculty. LEARN MORE/REGISTER
Photos by Laura Black.