Prasenjit Saha
Chem lab 106
2/6/13 Spring 2014
Prasenjit Saha, Abdullah Sharif
I. Warmup Questions
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 bean as it interacts with the water? Explain.
Essentially the warm water will run through the coffee beans and extract its properties. The flavor of the coffee beans would disperse into the water. The water would change color and smell like the coffee beans as these properties are drained from the coffee beans.
2. What would happen to the water if instead of coffee beans, strips of dried seaweed were used? Explain your prediction.
The exact same thing that happened to the coffee beans will happen to the seaweed. The warm water would also cause particular properties of the seaweed to be extracted into the water.
3. Define the following terms:
a. Decant. Slowly pouring a liquid solution from one container into another
b. Filtrate. Passing a substance, usually liquid, through a filter
c. Extract. Using methods such as evaporation or filtration to remove something from a substance
d. Precipitate. A solid that is extracted or removed from a solution
e. Tincture. An alcohol solution of a medicine.
II. Focus Questions
1. How can I make a pharmaceutical product from seaweed?
A pharmaceutical product can be made from seaweed by heating seaweed in water. This would cause the product to be extracted from the seaweed. Then the seaweed can be extracted from the water through filtration. Finally, using evaporation, the product can be extracted from the water.
2. Can a single substance be isolated from a mixture (i.e. seaweed)? What is that substance?
A single substance can be isolated or extracted from a mixture such as seaweed using methods such as filtration and evaporation. The substance would be