Rubber Easter Eggs!
This is a really cool science activity that involves dissolving egg shells in colored solution and then experimenting with the colored membrane that remains around the egg.
You will need:
Eggs, small jars, vinegar, food coloring
Now try this:
1. Place whole egg inside the small glass jar (I use both hard boiled egg or uncooked egg)
2. Completely cover the egg with vinegar and add a few drops of food coloring. Observe tiny bubbles forming on the egg.
3. Allow the vinegar-egg mixture to react for at least two days. Replace the vinegar/food coloring solution every day.
4. Feel the egg, if it feels "rubbery" remove the egg and rinse carefully under water.
5. Play a little with the egg, squeeze it lightly. Be careful if the egg is not cooked it will break apart easily.
Explanation:
The vinegar is a weak acid solution called acetic acid. This acetic acid dissolves the calcium carbonate egg shell. What remains on the egg is just it's membrane. This membrane will allow water molecules to pass through.
For more science experiments: www.chemicalkim.com