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
Sugar is more soluble in water than salt. This is because the bonds of the sugar molecules are weaker than the bonds of the salt molecules.Full Answer >
An egg floats in saltwater if the water is denser than the egg. The salt adds density to the water, but if there is not enough salt, the egg sinks.Full Answer >
On its own, salt cannot melt ice; it must be combined with water to lower the freezing point of the ice onto which the salt water solution is poured. However, ice can form again if the salt water solution reaches a temperature low enough to stop the melting process.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 >