South Street Seaweed Seaport

South Street Seaweed Seaport - Lorraine Chen Chem 106 Lab...

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Lorraine Chen Chem 106 Lab South Street Seaweed Seaport Warm up: 1. Coffee Beans are crushed into small pieces, water is added to it and the mixture is heated over a flame. What do you think would happen to the coffee beans as it interacts with the water? Explain your prediction I think the heating of the water and coffee beans would cause the water to turn a light brown color because this process is most likely removing some kind of excess substance from the surface of the coffee beans. This happens because of the rising temperature o the mixture being heated over a flame. 2. What would happen to the water if instead of coffee beans, strips o seaweed were used? Explain your prediction. I think that instead of the liquid turning a light brown color, it would turn to a light green or light yellow color because the heating is removing a different substance off of the surface of the seaweed than it is from the surface of the coffee beans. 3. Define the following terms: Decant - to draw off (a liquid) without disturbing the sediment or the lower liquid layers Filtrate - fluid that has passed through a filter Extract - the part of a complex organic material that is soluble in ether and consists chiefly of fats and fatty acids Precipitate - a substance separated from a solution or suspension by chemical or physical change usually as an insoluble amorphous or crystalline solid Tincture - a solution of a medicinal substance in an alcoholic solvent
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This note was uploaded on 09/20/2010 for the course CHEM 106 taught by Professor Bachu during the Spring '10 term at CUNY Hunter.

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South Street Seaweed Seaport - Lorraine Chen Chem 106 Lab...

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