The medium that they are suspended in can be a solid, liquid or gas (although gas colloids cannot be suspended in gas).The particles are approximately 10 to 10,000 angstroms in size and generally cannot be filtered, or settled out in an easy manner. The particles in a colloid can be solid, liquid or bubbles of gas. An example of a simple suspension would be flour in water, or sand in water.Ī colloid is a type of mixture intermediate between a homogeneous mixture (also called a solution ) and a heterogeneous mixture with properties also intermediate between the two. Many particles of a suspension can be separated through a filter. Particles in a suspension will settle out if the suspension is allowed to stand undisturbed. Particles in a suspension are larger than those in a solutions they are visible under a microscope and can often be seen with the naked eye. Common suspensions include sand in water, dust in air, and droplets of oil in air. A suspension is a mixture between two substances, one of which is finely divided and dispersed in the other.
