South Street Seaport
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
Observations :
Equipment :
Dried Seaweed in ½ pieces (Laminara Kelp) Bunsen Burner
150 ml beaker Medium Ring for Ringstand
Weight scale Matches
Distilled water Wire gauze
50 ml cylinder Evaporating dish
Funnel Filter Paper
Ringstand Wash Bottle
Glass stirring rod Tincture of Iodine
Mineral Oil Silver Nitrate
Iodine Crystals Small Test tubes
The first thing we had to do was fill a 150 ml beaker with 6 grams of dried seaweed, which we had to approximate on a
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
Observations :
Equipment :
Dried Seaweed in ½ pieces (Laminara Kelp) Bunsen Burner
150 ml beaker Medium Ring for Ringstand
Weight scale Matches
Distilled water Wire gauze
50 ml cylinder Evaporating dish
Funnel Filter Paper
Ringstand Wash Bottle
Glass stirring rod Tincture of Iodine
Mineral Oil Silver Nitrate
Iodine Crystals Small Test tubes
The first thing we had to do was fill a 150 ml beaker with 6 grams of dried seaweed, which we had to approximate on a