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Eggs shouldn't float in pure H2O. If salt has been added, however, then it is possible. You may not have noticed the salt if it was well dissolved. Adding salt to the water increases its density, so the pressure against anything submerged in it will be greater than if the object were submerged in pure water. The egg's buouyancy in the salt water, therefore, will be greater than its weight, so it will float. See the link at the lower left for more info on buoyancy and Pascal's principle. eggs float because the weight of the eggs is less than the rate of water displaced and so it floats.
These eggs have a bacteria growing in them, called T. Speziale, which can cause them to float.

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10y ago
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14y ago

Firstly an egg has a fatty yolk which is less dense than water.The white is probably the same density as water. There is an air sac inside which is for the first breath of air for the hatching chick. This adds buoyancy but the shell is slightly more dense than water.

Adding and subtracting all these densities it is found that dissolving salt in water increases the density of the water just enough to make it more dense than the egg components and it floats

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13y ago

Botulism: bacteria starts to grow within the egg. The byproduct of the growing bacteria is gas. Gas is less dense than liquid, therefore it floats to the surface.

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Q: Why do stale eggs float in water?
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Related questions

Why do rotten eggs float in water?

As the egg decomposes, the mass of the egg is reduced. This is because the egg shell is porous and water vapor and gases can escape over time, reducing the mass of the egg. If the mass of the egg is less than the mass of the volume of water displaced by the egg, it will float.


Why don't eggs float in sugar water?

when you will put eggs in water they will form a homogeneous mixture hence cannot float.


How does the salt make the egg float in water?

The salted water is denser than pure water and eggs can float.


What is the background research on Egg Flotation?

eggs float better with water and salt but they do not float in just water


How do you float yard eggs?

An egg float on salted water because the density of the egg is lower the the density of this water.


Do eggs float in sugar water?

no .egg will not flot on sugar water .


Can a egg float in cold water?

They can float in hot. Like if you boil eggs, before you set the pot, water, and eggs on the stove, you see that they don't float until the water gets warm.


Do eggs float or sink when they are boiled?

unboiled eggs float, but the boiled ones sink.


What type of egg will float better in water?

brown eggs


What kind of eggs float on salt water?

grade a large


What is the best object to float in salt water?

eggs, if i may. eggs can float in saltwater but not tapwater. in my opinion, eggs are not the best floating object for saltwater but they are one thing that floats


Do dengue mosquito eggs float on water?

Dengue mosquito eggs are not floating on the surface of the water, instead the eggs are located just right beneath the surface of water.