Gelatin, when dissolved in water, is a colloid because the protein molecules that compose it, mostly derived from collagen, are much larger than usual dissolved molecules, but they remain evenly dispersed throughout the water. Specifically, it is a type of colloid known as a sol, a colloid of solid particles dispersed through another substance. The lesser ingredient in a colloid, in this case gelatin, is called the dispersed phase.Continue Reading
Gelatin only remains a liquid when warm, becoming a gel when cooled. A gel is another type of colloid, where a liquid is dispersed through a solid. Warming a gelatin gel returns it to a liquid state. Any colloid, however, involves very large particles in solution. Colloids are very common in biological systems, because organic molecules can be much larger than most inorganic molecules.
Colloids come in a variety of types. One liquid dispersed in another is known as an emulsion. Milk is a very well-known emulsion. Even gases can be involved in colloids. Colloids where gases are dispersed in liquids or solids are known as foams. Colloids where solids are dispersed in gases are known as aerosols. Smoke is an example of an aerosol with solids dispersed through gases, while fog is an example of liquids dispersed through gases.Learn more about Chemistry
The hydrophobic effect refers to the tendency of nonpolar molecules to cling together when placed in water. Oil floating on water and water beading on waxy surfaces are examples of the hydrophobic effect.Full Answer >
Deionized water is water that is free from all charged atoms or molecules. It is water that has had all or almost all of its mineral ions removed, including sodium, calcium, copper, sulfate, iron and copper.Full Answer >
Hydrogen peroxide bubbles when it is poured onto a cut or a wound because of an enzyme called catalase, which catalyzes the breakdown of hydrogen peroxide into its constituent molecules of water and oxygen. The bubbles are formed when oxygen gas is released.Full Answer >
Water evaporates because individual water molecules break free of the bonds that hold them all together as a liquid. While water evaporates more in heat, it is possible for it to evaporate in cold conditions.Full Answer >