Ch_12-4_Colloids

Ch_12-4_Colloids - Colloids are classified as hydrophilic...

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COLLOIDS
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EXAMPLES OF EDIBLE COLLOIDS Mayonnaise: water, oil, and egg Coats dispersed oil and keeps it from coagulating Called emulsifying agent or emulsifier
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COAGULATION OF COLLOID FE10
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TYNDALL EFFECT
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TYNDALL EFFECT Suspension of iron (lll) hydroxide Homogeneous Solution Colloidal Solution E11
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Concentrated Hot ONE KIND OF COLLOID Clay makes this kind of colloid. Coagulates where river meets sea. E13
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HYDROPHILIC AND HYDROPHOBIC COLLOIDS
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Unformatted text preview: Colloids are classified as hydrophilic ("water loving") or hydrophobic ("water hating") Proteins--hemoglobin Mayonnaise: water, oil, and egg Emulsifying agent or emulsifier coats hydrophobic part SOAP MICELLES SURFACTANTS LOWER SURFACE TENSION 2 drops with same volume Lower drop flattened because of small addition of surfactant...
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This note was uploaded on 02/04/2011 for the course CHEM 126 taught by Professor Biolsi during the Spring '08 term at NJIT.

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Ch_12-4_Colloids - Colloids are classified as hydrophilic...

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