Salt added to water in a cup makes an egg float because the saltwater's density is greater than the egg's density. Density is a substance's mass divided by its volume. When sufficient salt is added to tap water, the mass of the salt-water solution increases, but the volume remains the same.Know More
The salt water solution's density is greater than that of plain tap water. This causes the egg to float. However, if the egg is placed in tap water, then it will sink to the bottom because its density is greater than the tap water's density. In physics, this phenomenon of an object floating in a substance is called buoyancy.
In an experiment to demonstrate density and buoyancy, it is also important to figure out how much salt will cause the egg to float. Most experiments will use different concentrations of salt in water to find this piece of information.Learn more about Chemistry
Salt does not directly affect the evaporation of water. However, the evaporation habits, temperatures and movement of certain areas of saltwater bodies can affect the salinity, or salt level, of those bodies of water, resulting in changes in evaporation and precipitation. Higher levels of evaporation and lower levels of precipitation result in higher concentrations of salt in bodies of water, while lower levels of evaporation and higher levels of precipitation result in lower concentrations of salt in bodies of water.Full Answer >
Dissolving salt in water is an example of a chemical change. The dissolution leads the salt to break into sodium and chlorine ions, so it alters its essential chemical properties. Even though boiling salt water ends up leaving behind a residue of salt, while the salt and water are together, the chemical processes change enough to be viewed as a chemical reaction.Full Answer >
In order for an egg to float, about 4 tablespoons of salt must be dissolved in 12 to 16 ounces of water. Typically, fresh eggs sink to the bottom of a glass of tap water.Full Answer >
Eggs float in salt water because salt water has a higher density than fresh water. Density is defined as the amount of matter, in this case salt, in a given amount or medium. The more matter, the denser it is.Full Answer >