Tuesday, November 19, 2013


             A colloid is a substance microscopically dispersed throughout another substance. This field of study was introduced in 1861 by Thomas Graham. Certain substances such as sugar, salt, and acids diffused readily through a parchment membrane, other substances such as gelatin, albumen and glue diffused at very slow rate. The substances belonging to the second category were given the name colloids.
            A type of homogeneous mixture in which the dispersed particles do not settle out.
Example: Butter, milk, fog, smoke, paint.

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