CHEM 1210 Lecture Notes - Lecture 6: Blood Plasma, Osmotic Concentration, Hemolysis
Document Summary
In true solutions, the maximum diameter of a solute particle is about 1 nm (1 nm = Colloid is solution in which the solute particle diameter is between 1nm and 1000 nm. Colloid particles have very large surface areas, which accounts for these two characteristics of colloidal systems; They scatter light and, therefore, appear turbid, cloudy, or milky. They form stable dispersions; that is, they do not settle out of solution. Tyndall effect: a phenomenon in which light passing through a colloid is scattered by colloidal-sized particles. (ex: smoke, serum fog) (1 nm = Brownian motion: the random motion of colloid-size particles. (ex: motion of dust particles in the air. What we see are not the dust particles themselves but the flashes of scattered light. ) Why do colloidal particles remain in solution despite all the collisions due to. Because of their large surface area, colloidal particles acquire charges from solution. For example, they all may become negatively charged.
