Egg Float`

In this research paper, I will tell you about my experiment which is called” How salty does the sea have to be for an egg to float?” I will be answering 3 questions, “What happens to salt molecules when dissolved in water?”, “Why does adding salt to water increase its density?”, and “Why would an egg float in water with a lot of salt?” I will also be defining some key words that are needed to understand this project.

Have you ever been to the ocean and realized that it’s a lot easier to float in ocean water than it is to float in regular pool water? It’s all because of the salt in the water. The salt molecules when added to water, reduces to sodium chloride, therefore making saltwater. This increases the density of the water.

Density refers to how packed or crowded something is. In order to find out the density of an object you have to know the mass and volume. Mass is a measurement of the quantity of matter and it is always the same. The volume is the quantity of mass. An easy formula to determine the density is Density= mass (g) / volume (mL). Adding salt to water increases the mass but doesn’t increase the volume. So if you divide the mass by the same volume, it increases the water’s density.

If you put an egg in a glass of regular tap water it will sink to the bottom because there is not enough density. If you take the same glass of water and add enough salt, this makes a solution, or stock. When you use serial dilution which is a series of stirring you can increase the water’s concentration ,or density, and when the salt molecules dissolve ,the egg is pushed up to the top making it buoyant, or in other words able to float. This process of serial dilution helps you find out the absolute concentration, or exact amount of salt that it takes to make the egg float. When you compare the regular glass of tap water to the glass of saltwater this is relative concentration.

So just remember that the density of water affects the...