The Folding Egg experiment uses the same ingredients as the classic Rubber Egg experiment with a fun difference. In this activity you will be able to amaze your buddies by folding up your egg into a small ball, then magically make it transform back into the shape of the original egg. Pretty cool!
Materials - Egg -Small Nail - Glass Container With Lid - Vinegar - Baby Powder
Watch Video: Folding Egg Experiment
Process Folding Egg Experiment:
1.Very carefully use the nail to gently poke a small hole in both ends of the egg. Use a twisting motion and pressure to poke the hole so your egg shell does not break. You might need to try a couple times. So have plenty of eggs
2. Next, stick something thin and long up into the hole you made and pop the yolk inside the egg. Kinda scramble it around a bit. Be careful not to crack your egg open while doing this.
3. Next go to a sink or outside on the lawn and blow through one of the holes. You want to blow the insides of the egg out. Do this until the egg is empty inside.
4. Fill the glass container with vinegar. With your hands submerge the egg. You will see bubbles start coming out of the hold you popped as vinegar fills the egg. Hold it under until the egg fills with vinegar and stays under. Or put another regular egg (with no holes) on top of it to hold it under.
5. Put the lid on the container and let it sit for up to 10 days. Check it daily. Carbon dioxide bubbles from the vinegar will start to form on the shell of the egg immediately. Over time the calcium carbonate shell will begin to dissolve and break off the egg. Eventually you will be left with only the translucent membrane that was the inside of the egg. When you no longer see the carbon dioxide bubbles the egg it probably finished. You will also see large parts of the egg shell have broken off and are floating in the container.
6. Once the egg shell has been completely dissolved open the container and pour out the vinegar. Take the egg into your hand and gently squeeze out the vinegar left inside it.
7. Next get out the baby powder and give the egg a good coating. Blow a little air into the hole to fluff up the egg and get some baby powder inside to coat the interior as well. The baby powder will give it a more realistic appearance and help from drying out too quickly as well as prevent sticking.
8. You are now ready to fold the egg up. Put it in your hand flat. Close your hand onto the egg. Then proceed to fold the egg into a small ball. You now have a folded egg. Next bring the egg back to life and amaze the crowd! To do this use your hands to gently toss the egg into the air back and forth between your two hands. Keep going! The egg will magically unfold and inflate back to it's original shape!
The Science Behind the Folding Egg Experiment:
Once you have completed the first part (making the holes) and blowing out the yolk inside, the folding egg works because the calcium carbonate (the outter hard shell) is dissolved away by the vinegar. The Vinegar creates a reaction with the calcium carbonate shell that produces Carbon Doixide gas which over the course of time dissolves that hard outter shell. What left is the soft inner membrane that was holding the yolk inside the shell. Since you blew out the yolk and used baby powder on it (after removing from the vinegar) it does not stick to itself. The 2 holes you poked allow air to get back inside after it was folded (as you toss it in the air).. Simple as that! And fun too! Now go and do the folding egg experiment with your friends.