When you drop an egg into freshwater, if the egg is good, it will sink. A good egg sinks in freshwater because the density of egg is higher than that of water. However, when you add and mix salt to the same freshwater, the egg will float. Does this means that salt spoils a good egg or something else? Try this ‘Floating Egg Experiment’ and learn the basic concept of floating egg.
Try it yourself
- Two glass tumblers of freshwater
- Two eggs (good ones)
- Some slat
- A spoon
- A stirring rod or an alternative
Step 1: Keep the glass tumblers with water in a row on a flat surface.
Step 2: Drop one egg each into the tumblers. Careful as you drop the eggs.
Step 3: Note what you see. Both the eggs must be sinking. If both the eggs are not sinking, the floating egg is not a good one. So, replace it with a good egg.
Step 4: Add quite a good amount of salt into one of the glass tumblers and stir well. Continue adding salt and stiriing the solution until the egg floats.
Of course, as you keep on adding salt to the glass tumbler, the egg in that glass tumbler will float.
Logic of Floating Egg Experiment
Floating Egg Experiment has a very simple logic – density. No, it is not because the salt spoils the egg that the egg floats. As you add salt to the freshwater, the density of freshwater increases. Only those objects that are denser than a liquid sinks in liquid. You can try this experiment in different ways – substitute salt with sugar or slat with borax powder and so on. The lesson that we learn here is the ‘density of liquid can influence floating and sinking of objects in it‘.