Copper cycle lab report. Copper Cycle Lab Report (400 Words) 2022-10-20

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The copper cycle lab is a common experiment conducted in high school chemistry or college level general chemistry courses. It is designed to demonstrate the principles of oxidation-reduction reactions and the concept of a redox couple. In this lab, a series of reactions take place involving copper metal, copper ions, and various other chemical species. The purpose of this lab report is to summarize the results and observations of the copper cycle lab, and to discuss the underlying chemistry involved in the reactions.

The first step of the lab involves preparing a copper oxide-copper sulfate solution by mixing solid copper oxide with aqueous copper sulfate. When these two chemicals are combined, a redox reaction takes place, in which the copper oxide is reduced to copper metal while the copper sulfate is oxidized to sulfuric acid. The balanced chemical equation for this reaction is:

CuO + CuSO4 -> Cu + H2SO4

The next step involves adding hydrochloric acid to the solution, which causes the copper metal to dissolve, forming copper ions in solution. This reaction can be represented by the following equation:

Cu + 2HCl -> CuCl2 + H2

The copper ions can then be precipitated out of solution by adding sodium hydroxide, which forms solid copper hydroxide:

CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl

The copper hydroxide can then be heated to form solid copper oxide, completing the cycle:

Cu(OH)2 -> CuO + H2O

Throughout the lab, various observations were made, including the change in color of the solutions and the appearance of solid products. The solutions were initially a blue-green color due to the presence of copper ions, but as the reactions progressed, the solutions changed color as the copper ions were reduced or oxidized. The appearance of solid products, such as copper metal or copper hydroxide, was also noted.

Overall, the copper cycle lab is a useful demonstration of the principles of oxidation-reduction reactions and the concept of a redox couple. It allows students to observe the changes that take place as copper undergoes various redox reactions, and to understand the underlying chemistry involved. By completing this lab, students should have a better understanding of the role of copper in chemical reactions and the factors that can affect its behavior.

Lab 7

copper cycle lab report

. While they are cooling, set up the gravity filtration apparatus. Some marks will be allocated to the completeness of your data. In a fume hood, use a 10-ml graduated cylinder to carefully measure about 3 ml of concentrated nitric acid, HON. At the end of the reaction the solution was tested with red litmus paper, which turned blue. Hold the Nichrome wire on top of the flame and repeat the step until the wire doesn 't show any color. Step II: Chemistry - Precipitating Cue OH 2 s with Noah as left over from the previous part.

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The Copper Cycle

copper cycle lab report

If your observations are not detailed, you may not receive full credit. Any nitric acid spilled on skin must be rinsed immediately with water for 15 minutes. Use 15 ml of the hot denizen water to thoroughly wash the Cue precipitate. To help us monitor acid-base reactions, we use litmus paper to determine if a solution is acidic or basic. Transfer the Cue strips into a clean 250-ml beaker labeled with one of your group member's initials. Describe the reaction between HON. The percent recovery for this experiment was 20.

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Analyze The Copper Cycle Essay Report Example

copper cycle lab report

Allow the beaker and contents to cool. Then, suck out the substrate and dispense in the organic waste flask. Collect the resulting crystalline precipitate of hippuric acid or benzoyl glycine , which contaminated with a little benzoic acid upon a Buchner funnel, wash with cold water and dry. First, the OH- from the Noah added will neutralize the excess acid left over from Part l. Page 4 of 12 The Cue precipitate is separated from the solution, called the supernatant liquid, using a method called gravity filtration. Solubility Rules Many ionic compounds are soluble-? Red litmus paper can be used to confirm the solution is basic.

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The Copper Cycle Lab webapi.bu.edu

copper cycle lab report

Wash all the flasks with PBS to remove any residue of the substrate and then dispense the liquid. Another method, which will be used in this experiment is using a gas syringe to measure the volume of the gas which has been produced. Many aspects of our lives involve chemical reactions-? How Does The Amount Of Baking Soda Mixed With Vinegar Affect The Volume Of Gas Produced? In this experiment, the balanced chemical equation, and the two half equations for the redox reactions will be provided, and the oxidizing and reducing agents will be …show more content… A stir bar was also added to the solution. Once all the HUH+ ions are neutralized, additional OH- ions react with the Cue+ complex ion to form a gelatinous blue Cue OH 2 precipitate. Once all the Zen metal is dissolved, the Cue metal can be isolated by decanting, or pouring off, the supernatant liquid. So the solution now contained a base, showing that the hydroxide was used up in this reaction. You should rewrite cited work in your own words, especially if the quotation ps more than a couple of sentences.

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Copper Cycle Lab Report (400 Words)

copper cycle lab report

Prepare the filter paper as shown below: Finally, place the plastic funnel in the small ring clamp, and place a 400-ml beaker beneath it to collect the filtrate the liquid that goes through the filter paper. Be sure to label each step I-V. Adding more OH- ions makes the solution basic, so it can turn red litmus paper blue. The two equations below both represent the unionization of hydrochloric acid, HCI as , but the second one shows a particular water molecule explicitly. This redo reaction returns copper to its aqueous phase. The appearance of the products after the reaction.

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Copper Cycle Lab Report

copper cycle lab report

There are other types of acids and bases that can react without forming water. Dilute the resulting solution with about 10 ml of denizen water. The product of the final reaction will be copper metal and the percent copper that is recovered will be calculated. The Copper Cycle Morgan Cuttlers Kay Dunham, Kylie Hanson, Maddie Warrick Introduction The purpose of this experiment was to demonstrate reaction types regarding copper and its cycle. Carefully place the beaker on the ring stand inside the upper ring. From this value of 1% copper in copper ore manufacturers can extract 9. During this process the copper metal is washed using 5mL of 95% ethanol in the Buchner funnel to get the metal out of the solution and then we dried out the metal for about 5 minutes to get rid of the Copper Cycle Lab In the first step of the cycle, about 5 mL of 6 M HNO3 were added to the beaker containing the 0.

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Copper Cycle Lab Report

copper cycle lab report

Most of these reactions can be classified into one of three main types of chemical reactions: precipitation reactions, acid-base naturalization reactions, and oxidation- deduction also called "redo" reactions. Water was removed from the dish, and the Cu was then washed thrice with 5 mL deionized water, and decanted between washings. The Solubility Rules also indicate which compounds are insoluble-? Allow the mixture to cool slightly and filter by gentle suction and wash it 3-4 times with CCl4. Others generally do not dissolve in water and are considered insoluble. In Part B we will synthesize two copper I compounds and observe their reactions. Thus, a clear solution becoming cloudy when another solution is added is often taken as experimental evidence of a solid or precipitate forming.

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Copper Cycle lab webapi.bu.edu

copper cycle lab report

Finally, Do again these two steps until notice that the subtractions of these masses are about 0. The final step is the recovery of the metal from the copper. Solution changed from colourless to dark red-brown to pale yellow. Step V: Chemistry V. Basso+ , Call s , cacao s , etc. Acids and Bases Acids can be defined as substances that produce hydroxide ions HUH+ when they are dissolved in water.


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Copper Cycle Lab webapi.bu.edu

copper cycle lab report

Once all the acid is neutralized, additional OH- ions react with the Cue+ to form Cue OH 2 s , a blue precipitate. Boil the water on a hotplate to wash the precipitate in step 6. A hydrated hydrogen ion H+ as is equivalent to an aqueous hydroxide ion. These results show that the provided sample of copper ore would be worth mining, since it contains a higher percent of cu2+ than is needed to mine for copper. Precipitating Cue OH 2 s with Noah as In Part II, two reactions are carried out by adding Noah as.

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copper cycle lab report

Once the solution turned clear, the reaction was complete. The reaction that occurred can be shown below. The evaporating dish was then placed on the steam bath to dry until the Cu had a sand-like texture. The presence of Cue+ as makes the solution blue. Identify the gas displaced from the acid in this reaction. Since the HUH+ ions do not dissolve the Cue metal, the amount of copper yielded is not affected by excess acid. Then the solution was mixed and dissolved in the 500 cm3 beaker.

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