Intro: Testing the 'Unbreakability' of Naked Eggs
Making Naked eggs, or bouncy eggs, or unbreakable eggs, is a popular experiment. It merely incorporates a simple reaction, to create something spectacular. Naked eggs, are made using vinegar, and normal eggs.
This experiment requires some patience, and is not completed in day.
Also, keep in mind, that even bouncy eggs are not unbreakable, and will break, if chucked from the first storey of a building.
So, the experiments tests the force required for breaking the egg, and a way to make it TRULY unbreakable.
Well, I think the 'naked egg' will burst, when dropped from approximately three feet.
Step 1: The ABSOLUTELY Egg-Sotic Ingredients
If you did not notice the sarcasm, I will use-
2.) Vinegar, i.e. Acetic Acid.
3.) An enclosure.
5.) Simple tools, like measuring tape.
I would advise you to be careful of the eggs throughout, as they cause quite a mess when they egg-splode.
Step 2: The Eggs-periment - Making Bouncing Eggs
If you still have the egg, in one piece, let us move on to the next step. In this step, you will place the egg in vinegar. Whatever your choice of container, the egg must be covered completely, for best results.
At this point of time, you may notice, tiny bubbles on the shell of the egg, and these bubbles are Carbon Dioxide.
If you want to find out more about what happens to the egg, head over to the 'Science of Egg-celence section.
Let the egg stay in the vinegar, so as to remove the eggshell. Remove the egg after say... 24 hours.
Be careful while removing the egg, as it has a good chance to break.
Also, observe the whitish substance, find out what it is below.
Next, put the egg back in the vinegar, and after about 3 days, it will be unique.
It is advisable to add a little extra vinegar daily, to provide a continuous supply of acetic acid.
Towards, the end, there will be a coating of a white substance, which you may rub out with your hand, or wash out gently.
Step 3: Egg-stream Chemistry
Why does this happen?
An eggshell is CaCO3, or Calcium Carbonate, and Vinegar is, Acetic Acid, or CH3COOH. When Acetic Acid reacts with Calcium Carbonate, it forms Carbon Dioxide, Calcium Acetate, and Water.
2CH3COOH + CaCO3 >>> Ca(CH3COO)2 + H2O + CO2.
The bubbles were in, fact Carbon Dioxide, and the substance was Calcium Carbonate. There was some water formed as well, you probable did not notice. Also, the substance that you rubbed out was Calcium Acetate.
When the eggshell, dissolved, two thin, yet strong membranes remained. Keeping it for a longer time allowed some of the liquid flow from outside to inside, and this is called osmosis.
Osmosis is the process by which a liquid flows from a less concentrated to a more concentrated solution, for a semi-permeable substance.
The eggshell normally breaks, due to the uneven pressure that cracks the shell, and the membrane does not stand, as the cracked part slices through the membrane.
Step 4: The Real Egg-speriment
We have made the naked egg, now let us test its strength. Is it really bouncy, or does it go boom fast?
For measuring the weight of the egg, I used my weighing scale, and found out that it is 85 grams. I decided to start by dropping it from 5 cm.
5 cm - Nothing relevant happened to the egg, it slightly bounced around, and then came to a rest
10 cm - The egg bounced around a little more, but the strong membrane stayed intact.
15 cm - The membrane started to dangerously wobble, and was almost destroyed.
20 cm - The egg burst. Big explosion, stinky results as expected. The vinegar that had passed through also leaked out after the explosion.
The egg took 0.1 seconds to fall, as measured by the formula t = sqrt(2*d/g), where g is the force of gravity, that is 9.81, and d = distance travelled.
So its Velocity would be
Displacement/time = 0.2/0.2= 1 m/s
Momentum = Mass*Velocity
= 0.085*1 = 0.085 kg*m/s = 85 g*m/s
Step 5: In Conclusion...
Naked eggs may be naked, but they are not strong, and do not deserve the title of bouncy eggs, or unbreakable eggs. (Going rhetorically, and not according to physics. According to physics almost everything bounces.)
Also, the egg has to be dropped from a height of 20 cm, or it has to attain the momentum of 85 g*m/s, for the shell to break.
This is not Myth-Busters, but I think I just busted a myth.
My fairly simple experiment proved that.
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