Then, six capillary tubes were used to spot the five known solutions and the one unknown. The unknown number and the colors of each solution were recorded. The Chromatography paper was then folded into a cylinder and stapled at the top edge. After that, enough 9:1 acetone: 6 M HCl solution was poured into a 600 mL beaker so that the depth was about 0.5 cm and the chromatography paper was stood up in the beaker, which was then covered with foil. The chromatography paper was removed with tongs
In the back lab, we mixed the urea water in a big jug and took all the urea water for the conicals out of the jug so we knew that the concentration of urea would be consistent. The dyes we chose were black, bright orange, blue, emerald green, and banana. Next, we measured out how much dye we would need to make the 200%, 100%, 75%, 50%, 25%, and 0% solutions using 50 mL of urea water per each conical. So since we used five different dyes and six different concentrations we required 30 conicals. Once all the dyes were separated by concentration
Nail polish remover contains the mixtures yellow dye, water, gelatin, fragrance, propylene carbonate and glycerol. So you have to do the heating by immersing a 25 Mk flask into the beaker with water filled into a hot plate. Experimental Procedures 1. First you have to set the distillation apparatus up. Use the ring stand & clamps to support the apparatus.
Stir each of the systems by drumming with your fingers on the loosely held test tube. To a 6th test tube, add about 1-ml Silver Nitrate solution. Label each test tube with the name of the chemical you used. Record these observations: System 1: FeCL3 System 2: KSCN System 3: K4Fe(CN)6 System 4: AgNO3 7. Mix pairs of solutions in the following ways, and record all of your observations in the data table.
Duplicating a Color with Dye Trohimczyk, Brianna; Delgado, Theon Purpose: The purpose of this experiment is to match the color of the control dye with the new color of the dye produced in the test tube. Hypothesis: When two drops of red dye are placed with one drop of yellow dye in a test tube of water, the result will match the color of the controlled dye. Materials: * Four colors of food coloring (red, green, blue, yellow) * Test tubes * Pipets Procedure: 1. Place water into a plastic cup 2. Use the pipet to place 10ml of water into an empty test tube 3.
The mixture was decanted again in to the same beaker. Next, we added boiling chips to the liquid and evaporated the solvent over the hot plates under the hood. After the solvent was evaporated and the flask was cooled, we used a spatula to remove a small amount of the crude product and took its melting point. We determined the melting point range of the sample to be 43.0-46.0 degrees Celcius.The crude product was yellow colored when it was warm and orange in color when cooled and sticky. We then recrystallized our sample using 5 ml of warm acetone that was heated on a hot plate under a hood.
Second, methyl benzoate is added to form a new carbon-carbon sigma bond. The intermediate magnesium alkoxide will then be hydrolyzed to form tertiary alcohol product. Experimental Procedure: Part A: Preparing the Grignard reagent • I placed 1.98 grams of magnesium turnings into a cleaned 250mL round-bottom flask and then attached the calcium chloride drying tube into the round-bottom flask • Then, I placed this flask onto a heating mantel and adjust the controller to setting ‘6’. This flask is heated until it was too hot to touch. • After the flask was heated, I removed it from the heating mantel and allowed it to cool to room temperature.
Procedure: First, collect all materials listed and fill the first well ¼ full with 1.0 mol HCl solution. Then, clean the wire and bend the end of it so that it makes a small loop at the end.
Conclusion: The purpose of this experiment is about the synthesis and characterization of aspirin. Salicylic acid and acetic anhydride will be mixed to produce acetylsalicylic acid and acetic acid. The catalyst is H3PO4. After crystallization, the aspirin was filtered using a vacuum filtration system and dried in an oven. A melting point will be ran on the aspirin when completely dry.
5) Measure what is left in the bowl with the dropper and record. 6) Repeat steps 2-5 until finished with all the cloths. 7) Take the average of each material and again record. Results Trials Average Paper Towels 4.51 Photo Paper 0.244 Polyester Fleece 4.72 59%polyester, 35%rayon, 6%spandex 0.054 Cotton 1.38 Polyester 0.43 Conclusion The purpose of this experiment was to find out which material would absorb the most water when left in a puddle for thirty seconds. There were six different materials