Download Biology answers. Show more details Add to cart. (2) Drops on a Penny lab Introduction - I pass out the lab materials and safety goggles. Once the penny has turned completely silver, use the tongs to remove it from the dish, and drop it into the beaker of water to cool. text. Find answers and explanations to over 1.2 million textbook exercises. This course allows students working in the lab to make measurements, synthesize and analyze compounds, and use Microsoft Excel to analyze the data obtained from their experiments. Related Questions . (penny – copper reacted) 2.56 x 1/63.55= .0403. Instead of making hollow pennies, copper foils with penny imprints are the result. Assuming 100 percent copper in the old penny, determine its cost (in cents) based on it copper content. You then chemically combine the two metals when they share their electron cloud. A penny containing more of a certain metal than another penny will have a different mass, because its density is different. We provide chemistry penny lab answers, and numerous book collections from fictions to scientific research in any way. Created by. University. Benjamin Franklin, who is well known for his famous quotation regarding the penny ("A penny saved is a penny earned"), suggested the first design for the new coin. Penny Sandwiches From 1864 until 1983, the usual composition of a penny (its actual name is “cent”) was 95% copper and 5% zinc and tin. Optional protocol using a penny as the source of copper (at the discretion of your instructor). Then we will plan and execute an experiment to test your hypothesis. This preview shows page 1 - 2 out of 7 pages. 6. Use the Background Information and Procedure to help you complete the Pre-Lab. Add 20 mL concentrated nitric (HNO 3) acid. Prepare introductory chemistry students for laboratory and provide a safe experience Emphasizing environmental considerations, Corwin’s acclaimed Laboratory Manual for Introductory Chemistry offers a proven format of a pre-laboratory assignment, a stepwise procedure, and a post-laboratory assignment. 3. mol → grams. done, you could bow to even more something like this life, almost the world. Try our expert-verified textbook solutions with step-by-step explanations. The zinc in the post 1982 penny should be revealed. If the average mass of your control group (those pennies minted before 1970) is different from that of any of the variable groups, you'll know that the pennies are not made of the same amounts of the same materials. Using pennies from 1982 or later, add one penny and record the new mass and volume. What is the density of the post-1983 pennies? After 1982, they started making the penny out of zinc and coated it with copper. Academic year. Daytona State College. Terms in this set (8) Observations of Part 1. Gravity. Penny Lab. Make sure it is dated prior to 1982. Name Lab Section DATA Table 1. In this lab, you will be converting a regular penny into a “gold” penny. Zinc was clumpy, gray/black/silver. Do not wash the pennies prior to weighing! Stoichiometry Lab – The Penny and HCl. Penny Lab Review. Sample Traditional Lab Report - Density of Pennies Hypothesis (Based on the instructions provided) The density of pennies made before 1982 will be greater than the density of pennies made after 1982. turning penny silver and gold before coming to the laboratory, read the discussion section below and complete the prelab exercise found in the florida online. For lab courses in introductory, preparatory, and basic chemistry. The Gold Penny Lab In this lab, you will be converting a regular penny into a “gold” penny. Because of the high cost of copper, the US government changed the composition of the penny in 1982, to copper coated zinc. 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