financial statement data by expressing each item in a financial statement as a percent of a base amount”(Weygandt and Kimmel 2008 p.699). When you want to complete a vertical analysis you will take the base amount of an item on the financial statement and take an item that makes up part of that item and divide them to find the percentage of the item it is. The first vertical analysis I will perform will calculate what percent of the company’s current assets make up their total assets in both 2004 and
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using pennies made before 1982 and pennies made 1982 or after. Hypothesis: The atomic mass of the pennium will be the average of the average masses of a pre-1982 penny and a post 1982 penny. Procedure: 1. Obtain a bag of pennies 2. Determine the total number of pennies in the bag. Record the value. 3. Sort the pennies by date into 2 piles. One pile should consist of pennies older than 1982‚ the other pile should include pennies that are 1982 or newer. 4. Count the number of pennies in each
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DETERMINATION OF % COMPOSITION OF PENNIES USING REDOX AND DOUBLE DISPLACEMENT (PRECIPITATION) REACTIONS Pre- Lab 8 Objective: The purpose of this experiment is to determine the percent composition of pennies using oxidation-reduction and double displacement reactions as well as titration techniques. We will take a post 1982 penny and place in a strong acid dissolving the zinc core and leaving behind the copper coating. We will figure out the percent composition from the mass of copper and zinc using titration
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Experiment 8 Determination of Percent Composition of Pennies Using Redox and Double Displacement (Precipitation) Reactions Objectives: The lab experiment will consist of oxidation-reduction and double displacement reactions as well as titration techniques. All these components will be used in order to determine the percent composition of pennies. In conducting redox and double displacement we are able to analyze a penny and figure out the chemical composition of the product
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Experiment 8 DETERMINATION OF % COMPOSITION OF PENNIES USING REDOX AND DOUBLE DISPLACEMENT (PRECIPITATION) REACTIONS Objectives: 1. Learn how to determinate the percent composition 2. Learn how to get the percent using oxidation reduction and double reactions 3. To become more familiar with the use titration techniques 4. To learn how to get the salt out of an quimical Background: To develop and utilize procedures to determine the percent composition‚ of ZnCI2. As well titrating with NaOH
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Composition of Pennies Using Oxidation-Reduction and Double Displacement (Precipitation) Reactions Questions to answer to help guide the development of procedures for the determination of the percent copper and zinc in pennies through titration and gravimetric techniques: 1. What is the weight of a post 1982 penny? 2. What is the percent copper and zinc in a post 1982 penny? 3. How many grams of copper and zinc are in a post 1982 penny? 4. How many moles of copper and zinc
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Trials 2‚ 3‚ and 4. In Exercise 1‚ you will determine the density of a solid of regular geometric shape‚ and identify the composition of the solid by comparing the density with reported values. In Exercise 2‚ you will determine the density of pennies by water displacement. B. Procedures Exercise 1. Density of A Regular Solid Apparatus: Electronic balances‚ beakers‚ regular-shaped solids‚ vernier calipers Safety Equipment: aprons‚ goggles Chemicals: None Objectives: In this
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My lab results were similar to my hypothesis. My hypothesis was that the densest object would be the rubber stopper. In the lab results the densest object was the penny and the rubber stopper was second. My hypothesis was switched. My hypothesis was correct when I stated that the macaroni was the third densest object. My hypothesis was also correct for the dice‚ but the bead and the dice share the same density. So they are both the fourth densest item. I was wrong with my hypothesis when I placed
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determination of the percent copper and zinc in pennies based on density measurements. 7. Record laboratory data and observations. MATERIALS: Erlenmeyer Flasks o 125 mL o 250 mL beakers o 100 mL graduated cylinders o 10 mL o 25mL Burette o 50 mL Volumetric pipettes o 10 mL Measuring pipet o 10 mL Burette clamp and stand Various liquids and solids for density determination measurements o Liquids Distilled water Heptane Carbon Tetrachloride o Solids Pennies Copper Zinc Lead Aluminum
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This experiment was performed to demonstrate a cycle of chemical reactions involving copper. This lab will start with copper as a reactant in the first reaction through a series of five chemical forms of aqueous phase reactions and ending to calculate the percentage of recovered solid copper as a product in the last reaction of the experiment. The experiment resulted in a percent recovery from the cycle of copper reactions of an increase to 139%. . Introduction: The purpose of this experiment is
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