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Colloidal Chemistry Research Project.
Member rating: No Rating | Words: | Submitted: Fri Feb 20 2004
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Colloidal Chemistry Research Project What are colloids? A colloid is a substance that is composed of extremely small particles of one material (the dispersed phase) evenly and stably distributed in another material (the dispersing phase/the continuous phase). In colloids the size of the dispersed particles (1-1000nm) are less than that of the particles in a suspension, but greater than that of molecules in a true solution, therefore a colloid is not a true solution but it is not a suspension either as it will not settle out like a suspension will over time. Types of colloids? The three forms in which all matter exist is solid, liquid and gas. Colloids can exist as any combination of these states: Dispersed particles Dispersing medium Name Example Gas Liquid Foam Shaving foam Gas Solid Solid foam Styrofoam Liquid Gas Liquid aerosol Fog, smog Liquid Liquid Emulsion Milk, mayonnaise Liquid Solid Gel Jelly, hair gel Solid Gas Solid aerosol Dust, smoke Solid Liquid Sol Paint, ink Solid Solid Solid...
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