experiment 28 chemistry of copper lab report
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. 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. Precipitation reactions yield a solid product that is insoluble. Chem Lab Report 28 - Lab Report Experiment#28 Chemistry of Copper Objective The purpose of this experiment was to have copper undergo a series of, 8 out of 9 people found this document helpful, Lab Report: Experiment #28- Chemistry of Copper, The purpose of this experiment was to have copper undergo a series of chemical reactions in, order to observe the way it reacted with each chemical. ( Log Out /  This particular lab report shows my ability to work with quantitative data, and analyze the calculations and measurements from the lab. 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. Start studying Experiment 28 chemistry of copper. Possible sources of error that could have led to a loss of copper most likely occurred during decanting. We also wanted copper to go through a. cycle in order to find its percent recovery after the chemical reactions it went through. The percent recovery of copper in this experiment was 90.8%. The percent recovery was 90.8%. The purpose of this experiment is to observe the qualitative aspects of a series of reactions involving copper. Procedure. This is a lab report for my General Chemistry class. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! The percent error in this experiment was 9.2%. Change ), You are commenting using your Facebook account. In part B, the copper(II) nitrate solution reacted with, the base sodium hydroxide (NaOH) to create a light blue precipitate known as copper(II), hydroxide and the aqueous solution of sodium nitrate. Calculations: mass of recovered copper equals dish and copper minus dish. 1.Measure about 1g of solid copper. 61.068 g – 60.614 g = 0.454 g. Percent recovery equals recovered mass over initial mass, multiplied by 100. After the six steps of the experiment, the same mass of solid copper should be recovered, based on the Law of Conservation of Mass. Table 1: Measurements and calculations of mass, and calculation of percent recovery of copper after the experiment was completed. To test this law, copper can be put through a cycle to test if the same mass of copper is present at the end of the cycle. South Texas High School For Health Professions, Lab Report Experiment 28 Chemistry of Copper.docx, South Texas High School For Health Professions • CHEM 1111, University of Texas, Rio Grande Valley • CHEM 1311, University of Texas, Rio Grande Valley • CHEMISTRY 1111, University of Texas, Rio Grande Valley • CHEMISTRY 1311, University of Texas, Rio Grande Valley • CHEM MISC, University of Texas, Rio Grande Valley • CHEM 1107. Change ), Biology Post-lab Report (Studying Mitosis), Biology Post-lab Report (Yeast Phenotypes), Chemistry Lab Report (The Activity Series). Second, errors could have occurred that caused the copper to be lost throughout the course of the experiment. Change ), You are commenting using your Google account. Decomposition reactions yield a product that is a broken down form of the reactant, such as AB à A + B. Acid/base neutralization reactions involve the creation of water and a salt. The purpose of this experiment is to test the Law of Conversation of Mass. The Law of Conservation on Mass states that all matter is conserved; no matter can be created or destroyed. Copper was put through a series of several reactions, until solid copper was the last remaining product. The solid containing copper settled to the bottom, and the liquid was removed via decanting. Course Hero is not sponsored or endorsed by any college or university. Get step-by-step explanations, verified by experts. Course Hero is not sponsored or endorsed by any college or university. The four types of reactions are oxidation/reduction, precipitation, decomposition, and acid/base neutralization. Change ), You are commenting using your Twitter account. This preview shows page 1 - 2 out of 2 pages. ( Log Out /  Percent error: [(0.500g – 0.454g) ÷ 0.500g] × 100 = 9.2%. 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. First, errors could have inaccurately raise the mass of the recovered matter. The scientific law that was tested in this experiment is called the Law of Conservation of Mass. This particular lab report shows my ability to work with quantitative data, and analyze the calculations and measurements from the lab.… South Texas High School For Health Professions, South Texas High School For Health Professions • CHEM 1111, University of Texas, Rio Grande Valley • CHEM 1111, University of Texas, Rio Grande Valley • CHEM 1311, University of Texas, Rio Grande Valley • CHEM 1301, University of Texas, Rio Grande Valley • CHEMISTRY 1111. If the copper was not completely dry at the time of weighing, then the measured weight of recovered copper would include some water. Lab Report: Experiment #28- Chemistry of Copper Objective: The purpose of this experiment was to have copper undergo a series of chemical reactions in order to observe the way it reacted with each chemical. It also shows my ability to recognize error and discuss how the error affects the outcome of the lab. This copper cycle consists of six different reactions and four different types of reactions. The copper solid reacted with zinc, and then was washed with distilled water. 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. The lab was to include a purpose, procedure, data/observations, all reactions and side reactions written out with qualitative data beneath each product and reactant except H20, and a summary. For part C, after having centrifuged the, products of the chemical reaction of part B, we decanted the solution from test tube to just have. There are two possible ways errors could have affected this experiment. Copper will undergo many types of reactions and go through its whole cycle, then return to solid copper to be weighed. Decanting occurred several times during this experiment, so losing a small amount of copper each time could have a larger effect on the recovery. Solid copper is the first reactant in this experiment. The liquid that was removed most likely contained some copper. ( Log Out /  Introducing Textbook Solutions. The initial mass of copper was recorded, and then compared with the mass of recovered copper at the end of the experiment. Experiment 28 – Chemistry of Copper Objective The objectives of this experiment include observing copper’s chemical properties throughout several chemical reactions, using a variety of techniques to isolate copper’s compounds from a solution, and determining the percent recovery of copper after going through a cycle of reactions. This sample would be the one to undergo a series of chemical reactions in order to find its, percent recovery. Cu(NO3)2(aq) – Red solid -> Brown gas + blue solution, Balanced Equation: Cu(s) + 4HNO3(aq) -> Cu(NO3)2(aq)+2NO2(g) + 2H2O(l), Cu(OH)2 (s) – Blue solution -> Muddy blue solid, Balanced Equation: Cu(NO3)2(aq) + 2NaOH(aq) -> Cu(OH)2(s) + 2NaNO3(aq), Balanced Equation: Cu(OH)2(s) -> CuO(s) + H2O(g), Balanced Equation: CuO(s) + H2SO4(aq) -> CuSO4(aq) + H2O(l), Copper (II) sulfate to copper metal – Blue solution -> Red solid + colorless solution, Balanced Equation: CuSO4(aq) + Mg(s) -> Cu(s) + MgSO4(aq), Balanced Equation: Mg(s) + H2SO4(aq) -> H2(g) + MgSO4 (aq), This textbook can be purchased at www.amazon.com. The first chemical reaction the Cu sample went through was reacting with, nitric acid (HNO3) in order to oxidize the Cu metal and create copper(II) nitrate aqueous, solution and to release nitrogen dioxide gas (which was a red-brownish color) from the test tube, where the Cu chemical reaction took place. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Oxidation/reduction reactions involve a change in oxidation number and a transfer of electrons. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Experiment 28 Report - Experiment 28 Chemistry of Copper Objective The objectives of this experiment include observing coppers chemical properties, 6 out of 7 people found this document helpful, The objectives of this experiment include observing copper’s chemical properties throughout, several chemical reactions, using a variety of techniques to isolate copper’s compounds from a. solution, and determining the percent recovery of copper after going through a cycle of reactions. This is a lab report for my General Chemistry class. Rather, matter is shifted and converted into different states. Create a free website or blog at WordPress.com. We also wanted copper to go through a cycle in order to find its percent recovery after the chemical reactions it went through. Conservation Of Mass: A Cycle of Copper Reactions. ( Log Out /  This preview shows page 1 - 2 out of 2 pages. In part A of the experiment, we started with a sample of copper (Cu) that weighed 0.017g. If the washing was incomplete or inadequate, then the recovered material would include some zinc, and therefore have a higher mass.

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