Abstract The objective of the south street seaweed experiment is to make a tincture of iodine. Iodine is used commercially as an antiseptic on cuts and scrapes of the skin. Conceptually, one of the active ingredients of the tincture, iodide, can be extracted from seaweed. By adding the seaweed to water and applying heat energy into the mixture, we were able to extract iodide. After adding Iodine salts, and filtering the mixture our next goal was to test for three important chemicals that must exist in our mixture for it to be a true iodine tincture; Iodine, Iodide Ion and the triiodide ion.
Observing Changes – Materials & Procedures Materials Water Copper (II) sulphate (Powder) Copper (II) sulphate solution Iron nail Sodium carbonate Hydrochloric acid Magnesium ribbon Flame (candle) Sugar Aluminum foil Test tubes Test tube rack Tongs Medicine dropper Spoons Beakers Safety goggles Scoopulas Procedures Water and Copper (II) Sulphate Procedure 1. Add a small amount of solid copper (II) sulphate to a test tube with a scoopula. Record the physical properties. 2. Write a hypothesis on what you think will happen when water is added.
12. With your fingertips, pinch the sides together of the empty pipette labeled Na2S203. 13. Gently tip the 24-well plate towards you so that the drops of Na2S203 are puddled together along the bottom rim. Insert the stem of the pipette into the puddle and release the pressure of your fingers to suck all of the Na2S203 into the pipette.
2. What would happen to the water if instead of coffee beans, strips of dried seaweed were used? Explain your prediction. Since the dried seaweed is not as soluble as the coffee beans, a solution of seaweed and water would not form. Rather, overtime the dried seaweed would soften with the water and form a mixture.
First of all, a pharmaceutical product can be made from seaweed by heating seaweed in water. This causes the product to be extracted from the seaweed. After that, filtration is needed to extract the seaweed from the water. Finally, by evaporating the product can be extracted from the water. 2.
For an object that is partially out of the nose, try to remove it with fingers or tweezers. Do not push it further into the nose. For an object that is deeper into the nose, have the child hold the clear nostril closed and ask them to blow several times to try and blow the object out. This may dislodge the object. For a child, you can try gently closing the unaffected nostril.
Mine Pre-lab questions 1. When you mix water and salt, you get a saltwater solution; where you can’t see the salt (chemical change). Therefore, making it soluble. Insoluble would be the antonym of soluble. 2.
One teaspoon of salt and one teaspoon of baking soda were put in two separate transparent glasses of water and then the time of dissolving of each substance were calculated. The results showed that the baking soda dissolves better in water than the salt. My hypothesis proved to be correct. To improve this study I would use a type of salt
Discussion & Conclusion In this experiment we learned how to synthesize the cyclohexene by dehydration of cyclohexanol. We procedure the first step where we have to mix the components. Then we heat the R.B.F with a fractionating column, distilled water. Then we obtained the layers, and we transferred the organic layer to a small, dry Erlenmeyer flask. We added anhydrous Sodium Sulfate as a drying agent.
This means that you have an ability to organize information, make comparisons, interpret data, and give descriptions. You understand uses and implications of words, facts, and concepts. You are able to recognize, identify, discuss, and classify. The third level, applying, requires that you are able to solve problems by applying prior knowledge. You can implement what you know and combine facts to discover new ideas.