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1. transparent blue The second reaction between the excess reactant, aluminum, and the limiting reactant, copper (II) hydroxide, produces elemental copper. Change ), You are commenting using your Google account. Observe the demo provided by your teacher in order to see the final product. Day 1 Conversion 1 -- Changing Cu to Cu(NO3)2. Cu2+(aq) + 2OH-(aq)Cu(OH)2 (s) In modern times, we take for granted the supply of metals, as well as plastics and medicines. The reaction that took place in Part 2 is as follows: copper (II) hydroxide → copper (II) oxide + water. Follow me at Linkedln https://www.linkedin.com/in/karanvir-sidhu-b6995864/. 0.10 M of Cu(NO3)2 solution is reacted with 2 M NaOH solution to obtain Cu(OH)2 . Scribd will begin operating the SlideShare business on December 1, 2020 The four types of reactions are oxidation/reduction, precipitation, decomposition, and acid/base neutralization. There is a wide range of copper based materials made for a large variety of applications. Cu(NO3)2 (aq) Observe evidence that a chemical change has taken place. 6. Do you have a comment or suggestion about this resource? When working with acids and bases, if any solution gets on your skin immediately rinse the area with water. In the first This lab supports the following unit, topics and learning objectives: and colorless Therefore, we need to develop methods for chemical processing that are both chemically and environmentally efficient. The percent error in this experiment was 9.2%. Heat until the water boils. The second reaction that took place in Part 4 is as follows: aluminum + hydrochloric acid → hydrogen gas + aluminum chloride, Lisa Parsons Solid copper is the first reactant in this experiment. Place a 12 cm piece of aluminum wire in the test tube. Purpose: The purpose of this experiment is to demonstrate a cycle of reactions involving copper. Mix the combined solutions with the stirring rod. The reaction with excess hydrochloric acid added in the previous step produces hydrogen gas. Change ), You are commenting using your Twitter account. Take approximately 1.5 grams of copper wire; lightly sand with steel wool, weigh it and record its mass. I hope it might be helpful to you. ( Log Out /  Experiment on the analysis of copper in brass by uv visible spectroscopy, No public clipboards found for this slide. As early as 4500 BCE, copper was one of the first metals to be isolated, due to the ease of separating it from its ores. Finally found a service provider which actually supplies an essay with an engaging introduction leading to the main body of the exposition Here is the site ⇒⇒⇒WRITE-MY-PAPER.net ⇐⇐⇐, If you are looking for customer-oriented academic and research paper writing service try ⇒⇒⇒ WRITE-MY-PAPER.net ⇐⇐⇐ liked them A LOTTT Really nice solutions for the last-day papers, www.HelpWriting.net is a really good site. Using test tube tongs, remove the test tube from the hot water bath. The assignment was to create a formal lab report that expresses data and observations, lab procedure, and a discussion of the data with a conclusion. Decanting occurred several times during this experiment, so losing a small amount of copper each time could have a larger effect on the recovery. Calculations: mass of recovered copper equals dish and copper minus dish. This reaction will be complete when the solution turns from blue to clear and elemental copper has collected on the aluminum wire. This activity works best if students stop after Part 1 and complete the questions specific to the reaction completed before moving on to Part 2, and so on. Turn off the hotplate. This fact alone makes it a very valuable metal to recycling plants. The Copper Lab demonstrates stoichiometry in chemistry. At the completion of the lab, elemental copper will be produced. In this lab, students will demonstrate their understanding of writing, balancing, translating, and identifying types of chemical reactions. 1.0 Copper (II) nitrate (3 mL per each group). part of experiment, the copper (II) ion is used to make new compounds This laboratory experience could also be used to introduce limiting and excess reactants as an extension. Understand copper is being recycled throughout the experiment. Units are used to represent an ionic compound. Add 1.0M copper (II) nitrate solution to the lowest mark on the test tube. Clear and Clear, Transparent The previous reaction that took place involved aqueous copper(ii) sulfate and … Students should wash their hands thoroughly before leaving the lab. Molecules are used to represent a covalent compound. In theory, the exact same amount of copper should have been recovered at the end of the experiment yielding a perfect 100% recovery, but that is usually not the case in lab situations. See our Privacy Policy and User Agreement for details. Slowly, while stirring, add all the waste HCl solution to the filtrate. From an environmental standpoint, recycling copper provides an excellent way to minimize the impact we have on our environment. The solid containing copper settled to the bottom, and the liquid was removed via decanting. Grade Level. Lab report on synthesis of Alum using Aluminum. Second, errors could have occurred that caused the copper to be lost throughout the course of the experiment. 20 mL Last updated September 2, 2020. This particular lab report shows my ability to work with quantitative data, and analyze the calculations and measurements from the lab. There are two reactions taking place in Part 4. Precipitation reactions yield a solid product that is insoluble. A percent recovery will be calculated and sources of loss (or gain) will be identified. The purpose of this experiment is to test the Law of Conversation of Mass. Copper (II) nitrate will undergo a series of reactions including decomposition, single replacement, and double replacement. The final result was amazing, and I highly recommend ⇒ www.HelpWriting.net ⇐ to anyone in the same mindset as me. Procedure. Describe reactions by writing word equations and balanced chemical equations. Alloys of copper (bronze, brass) were discovered quite early in history and used in international trade. Leave the wire in until no reaction is observed. Alma, Michigan. | Join AACT I require students to show me their work from Part 1 before moving on to Part 2 (and etc.) PART A: This clarification is helpful for students to understand. ( Log Out /  Clipping is a handy way to collect important slides you want to go back to later. Part 3: A clear solution of hydrochloric acid will be added to the copper (II) oxide, and upon stirring should turn back to a blue solution. See our User Agreement and Privacy Policy. LAB in Observations, Chemical Change, Balancing Equations, Classification of Reactions, Chemical Change. This copper cycle consists of six different reactions and four different types of reactions. When students complete the lab, instruct them how to clean up their materials and dispose of any chemicals. Heat it until no more changes occur. Recycled copper is worth almost 90% of the cost of newly refined copper. The purpose of this lab is to perform a sequence of chemical reactions illustrating the properties of copper and its compounds. Cu(NO3)2 (aq) + 2NaOH (aq) Cu(OH)2 (s) + 2NaNO3(aq) Identify the type of reaction that is taking place: List your observations that indicate a chemical reaction is taking place: Obtain a 100 mL beaker and fill half way with water. Unfortunately, the supply of these materials is limited, and as the population and demand continues to grow the consumption of these materials is increasing. Use the lab pencil and ruler to make three marks on the test tube. The percent recovery was a high 90.8%, but this is likely because both types of errors occurred, then cancelled each other out to some extent. Note: Hydrochloric acid and aluminum chloride are aqueous; aluminum is a solid. Hydrogen gas will be produced (bubbles will be visible). Percent error: [(0.500g – 0.454g) ÷ 0.500g] × 100 = 9.2%. Be patient, this will take time! Write the balanced chemical equation including states of matter below. We have come to depend on the chemical industry to provide us with the materials needed for everyday life. It also shows my ability to recognize error and discuss how the error affects the outcome of the lab. The percent recovery was a high 90.8%, but this is likely because both types of errors occurred, then cancelled each other out to some extent. Now customize the name of a clipboard to store your clips. The reaction that took place in Part 3 is as follows: copper (II) oxide + hydrochloric acid → copper (II) chloride + water. Possible sources of error that could inaccurately raise the mass of the recovered matter include incomplete washing of copper during the last step of the experiment, or incomplete drying of the copper solid before weighing. This lab supports the following unit, topics and learning objectives: By the end of this lab, students should be able to, This lab supports students’ understanding of, Lesson: 2 periods (45 min) or 1 block (95 minutes). | Renew Membership. If you wish to opt out, please close your SlideShare account. 1. Copper holds as much as 90 percent of new copper value, and as such it is one of the basic targets for many scrap metal collectors.Here are some other basic facts about copper and copper recycling: After the six steps of the experiment, the same mass of solid copper should be recovered, based on the Law of Conservation of Mass. In the final step of the lab when the copper precipitate was washed, zinc ions were removed. Log In ( Log Out /  Always wear safety goggles when handling chemicals in the lab. Weigh and record its mass. 10 mL Table 1: Measurements and calculations of mass, and calculation of percent recovery of copper after the experiment was completed. thanks, 7 Second Daily Ritual Melts Stubborn Fat While You Sleep ➽➽ http://tinyurl.com/y33eq8tt. Atoms are used to represent an element. 0.10 M This is a lab report for my General Chemistry class. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Mix with stirring rod. Next, add 1.0M hydrochloric acid to the third mark on the test tube. A specific quantity of copper will be transformed through a series of reactions and then recovered as solid copper. As of this date, Scribd will manage your SlideShare account and any content you may have on SlideShare, and Scribd's General Terms of Use and Privacy Policy will apply. Let us know! The percent recovery was 90.8%. Identify types of reactions taking place. In theory, the exact same amount of copper should have been recovered at the end of the experiment yielding a perfect 100% recovery, but that is usually not the case in lab situations. Place final product in waste container and clean up lab space as directed. Cool the test tube and its contents for 2 minutes by placing it in the room temperature water bath that you created in step 1. Then adjust the pH of this mixture between 5 and 9 by adding 1.0 M acid or base, as needed. For the lab, stoichiometry was used to predict the amount of copper that would be left over. A single replacement reaction will also occur, allowing copper solid to be formed. where elemental copper was regenerated. Wash your hands thoroughly before leaving the lab. Alma High School Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Students may also view this copper recycling lab on. Rinse stirring rod with water after using. The scientific law that was tested in this experiment is called the Law of Conservation of Mass. Purpose: The purpose of this experiment is to demonstrate a cycle of reactions involving copper. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Write the balanced chemical equation including states of matter below. If you continue browsing the site, you agree to the use of cookies on this website. on day 2. Pour the neutralized mixture down the drain. Disposal according to Flinn Method #26b. If you continue browsing the site, you agree to the use of cookies on this website.

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