Log onto the computer and start LoggerPro. Open the experiment file “Equilibrium”, which can be found under “Experiment Information” from the eCampus page. Under the “Experiment” heading in the toolbar, click on “Calibrate” and “Spectromoter 1”. This will turn on the light source in the spectrometer. Wait 90 seconds for the light source to warm up, then fill a cuvette with distilled water and clean the flat, clear sides on the cuvette with a Kimwipe, removing dust and fingerprints before putting the cuvette into the instrument.
4. Use the markers to draw a different colored dot on each of the appropriate pencil marks on the paper strip. Allow the ink to dry, and then go back and add more color to each dot. Before you complete the rest of the lab, make a prediction of the pigment components you expect to see from each marker’s ink. 5.
Set up Kohler and observe the specimen on the slide with 10x objective lens then move to 40x objective lens, switch from BF to fluorescence. 4. Once in focus set up the ocular micrometer to be adjacent to the nucleus to
I would then put the connector onto the end of the cable. The barrels of the connector should slide under the shielding. Push the center pin until it clicks into the connector. Slide the ferrule along the sleeve down the cable so that it pushes the braided shielding around the barrel of the connector. I would then crimp the ferule barrel twice, once at the connector side and again at the jacket side.
Lastly add 1 mL of water using the buret for water to the last beaker, and label this beaker “Green”. Clean and dry 4 cuvettes. The next part of the experiment is to actually use the spectrophotometer to find the absorbance of the green, yellow, and blue tubes. First, make sure the spectrophotometer is connected to the computer. The first step is to calibrate the blank or the background, and to do this, a cuvette of distilled water is inserted into the spectrophotometer.
Finding Ka and pKa values of Bromothymol Blue with Spectrophotometry Lancaster Weld* Greg Maggard (*-Primary Author) There are numerous ways that chemists, and other scientists, find the value of equilibrium constants. In this experiment, the equilibrium constants Ka and pKa were determined using a spectrophotometer. In part one of the experiment, four cuvettes were prepared for part 2 of the experiment. In order to prepare these four cuvettes, 0.401g of NaH2PO4 and 0.400g of Na2HPO4 were placed in a 150 mL beaker. Next, 50 mL of distilled was placed into the 150 mL.
0.9 0.8 0.7 Absorbance 0.6 0.5 0.4 0.3 0.2 0.1 0 400 450 500 550 600 650 700 750 λ max 500 nm 550 nm • • Make sure you understand the directions for using the spectrophotometer and have them written in your manual. Complete the questions on the prelab page. Introduction: There are many different chemical methods that can be used to determine the concentration of a solution. You have already used one method, titration, to find the concentration of Ca+2 ions in a sample of water, and another, density, in finding the concentration of ethanol. In this lab you will use a method called visible spectroscopy to determine the concentration of a solution of CoCl2.
Experiment 5- Limiting and Excess Reagents Purpose The purpose of this experiment was to calculate product and reactant amounts using reaction stoichiometry, as well as calculating the limiting and excess reagent in a copper (II) nitrate and potassium iodide reaction. We tested the reaction with different amounts of Cu(NO3)2 and KI making duplicates of each, with a total of 4 test tubes per group. Procedure Found in lab manual starting on page 91. 1. Collect 4 small test tubes and weight them.
Assessment for Round the Moon. Task: Your Task is to summarize and analyze the book in light of Bloom’s Taxonomy. Materials: Paper or construction paper, writing utensil s.a. colored pencils, pens, crayons, markers, tape or glue. Method: You will work in groups of 2 or 4. You will use the shape provided to construct Bloom’s ball.
AP Chemistry Guide for writing and formatting a formal lab report Lab Notebook Set-up ← Number all pages in lower outside corner, in ink. ← On page 1: Design an aesthetically pleasing cover page. Include your name, course title (AP Chemistry), the school year and a graphic. Graphics must be completed in color and represent the full gamut of chemistry ideas. This may be hand-drawn, computer generated or a collage effect using periodicals.