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 tincture of iodide.
The Term Paper on Coffee Bean Marijuana Drug Hemp
Illegal drug use is a major problem in the world today. Million of dollars are spent ever year to prevent the trafficking and distribution of these drugs. Virtually all Drugs is smuggled into the United States concealed in false compartments, fuel tanks, seats, tires of private and commercial vehicles, pickup trucks, vans, mobile homes, and horse trailers. Large shipments usually are smuggled in ...
III. Observations of reagents and starting materials. Color Iodine crystalsGray Tincture of iodine from PharmacyBrownish Black Laminaria (Kelp) or Fucus seaweedDark green Rubbing or isopropyl alcohol Clear IV. Procedure 1. Weigh five grams seaweed. 2. Wash the seaweed to get rid of Monosodium Glutamate 3. Boil the seaweed in 40 ml water for 5 minutes 4. Filter the seaweed and collect about 3 ml solution 5. Pour the solution to a clean beaker, then add 3 crystals of iodine 6. After 10 minutes, conduct the observation test V. Observations of all tests Standards Iodine TestLight Purple
Iodide TestYellowish milky white, some precipitate Triiodide TestBrownish red Iodine TestLight purple on top, Orange on bottom Iodide TestYellowish milky white Triiodide TestBrownish red, Lab made Tincture of Iodine VI. Post-Lab Questions 1. It is only through the study of isolated and purified elements and their combinations that one can observe characteristic properties and make cause and effect relationships. What does this statement mean and why can’t this be said about mixtures? The statement means that for us to ensure that we are observing the characteristics properties of a substance we have to make
sure we are looking at a pure form of that particular substance. For example, if I am observing the characteristics of iron, I have to look at pure Iron. If it is not a pure form of iron then our observations could be invalid because we could be observing the properties of other substances. The statement cannot be said about mixtures. This is so because mixtures contain many substances, Therefore, we cannot ensure that the observed characteristic adhere to a particular substance in the mixture. 2. A water disinfectant that uses iodine can be purchased at most stores that sell camping and hiking equipment.
On such product is called polar pure water disinfectant. The following description was written in your book. How would you test if this product really disinfects drinking water? What experiment would you do? I would start with a control group and an experimental group. The control group would be unfiltered water. The experimental group would be a solution of water with Polar Pure Water Disinfect. I would then follow the Dosage table carefully. I would make sure that the temperature is at 20 degrees Celsius. After 20 minutes are complete, I would examine both the control and experimental group for Giardia cysts.
The Term Paper on Group Response Techniques
Active student responding is a critical component of effective instruction in class room . One low tech strategy developed to facilitate active student responding during group instruction involves the use of response cards . Typically this approach involves the teacher asking questions during instruction and having each student write down his / her answers on the response cards and then display ...
