Osmosis and Diffusion (Science Experiments)
How does osmosis work?
Changing Concentrations: Will a bag of salt water draw in fresh water?
Gas and liquid moleculesThe smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms. are always in motion. They move randomly in all directions and bounce around and into each other. As they move, molecules have a tendency to spread out, moving from areas with many molecules to areas with fewer molecules. This process of spreading out is called .
You have probably noticed diffusion in your home. If you opened a bottle of vanilla in your kitchen, for example, you probably could soon smell the vanilla in all parts of the room. The vanilla spread through the air from an area of high concentrationThe amount of a substance present in a given volume, such as the number of molecules in a liter. of vanilla molecules to areas of less concentration. They diffused throughout the roomnd perhaps throughout the house.
(pronounced oz-MO-sis) is a kind of diffusion. Osmosis occurs when a substance diffuses across a semipermeableA thin barrier between two solutions...
(The entire section is 3050 words.)
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