The sequence begins with copper metal and ends with copper metal, so it is called a cycle of copper reactions. Weight of H2O is 11.2 g. The gases (and their smells) commonly formed in chemical reactions are H2S (rotten egg), SO2 (burnt match), CO2 (odorless, doesn’t support combustion), O2 (odorless, supports combustion), H2 (odorless, explosive), and NH3 (ammonia). Thus, the same number of moles of copper was produced in the final reaction because the amount of copper remained constant throughout the experiment. Initial temperature, T1 = 25 oC Question: THE COPPER CYCLE: A Series Of Reactions Pre-Lab Questions 1. Write the balanced chemical equation for this reaction. A Cycle of Copper Reaction. Copper also forms an important series of alloys with aluminum, called aluminum bronzes. This cycle of reactions i s: 4 HNO 3(aq) + Cu (s) → Cu(NO 3) 2(aq) + 2 H 2O (l) + 2NO 2(g) (1) Cu(NO 3) 2(aq) + 2NaOH (aq) → Cu(OH) 2(s) + 2NaNO 3(aq) (2) Cu(OH) 2(s) → CuO (s) + H 2O (l) (3) CuO (s) + H 2SO 4(aq) → CuSO 4(aq) + H 2O (l) (4) CuSO 4(aq) + Zn (s) → ZnSO 4(aq) + Cu (s) (5) You should recognize several different types of reactions in this cycle. Figure 1. The cycle of copper reactions starts with solid copper metal and ends with solid copper metal. We explored one such reaction in lecture when we combined zinc with nitric acid. 2- Classifying Reactions in the Copper Cycle. c. What percentage of the copper did you recover? 2. After performing all the reactions, you have 0.466 g of Cu. The final washing removes the soluble ZnSO4. Reaction 1 is a redox reaction because it involves oxidation of Cu solid to Cu (II) ion and reduction of the nitrate ion to gaseous nitrogen dioxide. %PDF-1.5
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After performing all the reactions, you have 0.466 g of Cu. The copper first underwent a redox reaction with nitric The amount of copper recovered at the end of the four-reaction cycle provides a good test of laboratory technique and efficiency. A Student Weighed A 25-ml Erlenmeyer Flask And Found It To Be 22.683 G. 2. First - the reaction of copper with (concentrated) nitric acid is exothermic. Sulfur when heated becomes red because of its phase transition (from solid to liquid), and later it reacts with copper in a pretty simple reaction:Cu + S --> CuS . Cycle Of Copper Reactions Lab Report. 0
It is a continuous process. Cu(s) CuC12(aq) 3. Here is some background information so you will understand the chemistry behind the reactions you will perform. The water cycle, also known as the hydrologic cycle, is the continuous movement of water from the earth’s surface to the atmosphere and then back to the ground. Beginning with pure copper at the top of the figure, these are: Reaction 1: Oxidation of metallic copper with nitric acid (HNO 3). A: The most important contributor is the resonating structure with the highest stability. What kind of reaction is this? The atomic theory predicts this behavior. In redox reactions, the oxidized and reduced forms of each reactant are called a redox couple. copper reactions. The success of the … NOTE: You must wear goggles and aprons throughout this experiment!! INTRODUCTION The purpose of this experiment was to cycle copper through five different reactions. Fill in the blanks to show the reagents that will be used in each step. Thus, the same number of moles of copper was produced in the final reaction because the amount of copper remained constant throughout the experiment. j��3���~�*�Ӆ�>~�Yʧ]�?���Z�cX���x�]Ҽa;�i�`���.�y� c�vX�a��y7�f-�
kA��Z�k���f0�_����َ�*�a-��~_N٧�ѷ��m/�ԃN��e��]z��Q�h�ɐ���z��a�S��"�[ah��wBĚ�x6-+ When this compound is heated, it is transformed to copper (II) oxide, CuO. The cycle of copper reactions starts with solid copper metal and ends with solid copper metal. Often side reactions, 2. Start studying CHEM 1212: Exp. Don't Worry About Typing Subscripts, If You Do Not Know How To Do Thot In Word. Unit of molarity is M or mol/L. After all of the chemical reactions have finished, the final mass of copper was 6.85 grams. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The Copper Cycle Alexes Montalvo Chem 1500-10 September 26, 2012 The Copper Cycle Introduction: The Copper Cycle is a popular experiment used to determine if an element, in this instance, copper, reverts to its elemental form after a chain of reactions.This experiment is very dangerous because of the reactions between the strong acids and bases. 1380 0 obj
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What percentage of the copper did you recover. This is a cycle of reactions, because you start and end with the same substance, copper metal. 1.9) Two test tubes are taken and labeled A and B. As the reaction progresses and [Cu +] decreases in the copper half-cell, positively charged sodium ions are transferred in to keep the charge balanced within the half-cell. h�bbd```b``�"�d1�d[ "��A${>�d���A�@�)���$�� bo����3012�^ �M �?ß
o Gy? When copper (II) sulfate and aluminum are allowed to react, aluminum sulfate and copper are formed. sample through a series of five reactions • The end product will be your original copper sample, making this a cycle of reactions. The reaction … 2. Record your observations for this reaction, as if you were performing it in lab. The amount of copper recovered at the end of the four-reaction cycle provides a good test of laboratory technique and efficiency. This is roasted in air to give black copper (II) oxide, which can be redissolved to regenerate the starting solution of copper (II) sulfate. A Cycle of Copper Reactions In this experiment, you will begin with the element copper, and carry out a series of chemical transformations in which you will see copper in other forms. %%EOF
Second - the maximum possible yield (note correct spelling) is 100%, which. The more stable ... Q: 48. INTRODUCTION The purpose of this experiment was to cycle copper through five different reactions. When I do this with my students, we start with copper pennies, and end up with "mossy" copper. Fill in the blanks to show the reagents that will be used in each step. ABSTRACT The purpose of this experiment was to cycle copper through a series of different chemical forms by reacting the copper with different chemicals. The cycle of reactions to be performed is shown in Figure 1. Two iron nails that were cleaned by rubbing with sand paper were immersed into test tube B and left undisturbed for 20 min. The final step will be to add zinc to precipitate copper metal by single displacement. A: Incorrect units are used in the final answer. Answer: sunlight 2AgBr(s) -----> 2Ag (s) + Br 2 (g) (Silver Bromide) Q13: Why does copper vessel acquire green coating in rainy season? The cycle of copper reactions to be performed in this experiment. ... Our answers are of high quality from professionals and will give you insight to understand your class concepts effectively. CYCLE OF COPPER REACTIONS. You will carry out the Copper Cycle using the ordering you created in discussion. Final temperature, T2 = 775... A: The addition of HBr into a double bond occurs through a carbocationic intermediate. Observations will be made for each reaction. 3. Beryllium copper (2 percent Be) is an unusual copper alloy in that it can be hardened by heat treatment. What percentage of the copper did you recover? You should, At different stages of the cycle, copper was present in different forms. I hope you enjoy this video! Follow all directions carefully!! Substan... Q: How much heat, in joules, must be added to a 75.0 g block of a metal alloy with a specific heat of 0... A: Given, Observations will be made for each reaction. Copper Cycle Chemists in industry often use stepwise procedures involving a sequence of chemical reactions to obtain a desired product. b) The "copper" you recovered wasnt pure and contained one of the intermediate copper complexes (nitrate,hydroxide,etc.) The initial mass of the copper was 2.004 grams. Weight of H2SO4 is 56.6 g. The sequence begins with copper metal and ends with copper metal, so it is called a cycle of copper reactions. Don't use plagiarized sources. Suppose you start with 0.493 g of Cu. Preparation of Cu (OH)2. endstream
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The Copper Cycle Most of the background material for this laboratory will be covered in greater detail in the lecture course later in the semester. The original copper sample contained a specific number of moles of copper, and that amount of copper was present in every reaction, precipitate, and solution. Lab Report #3: Copper Cycle Abstract: The purpose of the experiment is to cycle solid copper through a series of five reactions. If heat had been applied more frequently during the experiment I think it would have speeded up the reactions a bit more. Copper metal is successively treated with nitric acid, sodium hydroxide, heat, sulfuric acid, and magnesium in a cycle of chemical reactions to regenerate the copper metal. It is then converted to copper (II) hydroxide, Cu(OH) 2. , by reaction with base. The percent recovery came out to be 17%. A vigorous displacement reaction occurs and the solution gets very hot, aluminium dissolves and red copperis visible. Hence, it does not have a starting or an ending point. Redox couples are written "ox/red". The Copper Cycle In this experiment, you will carry out a series of reactions to transform copper into various forms and learn more about the three main types of chemical reactions: precipitation, acid-base neutralization, and From this blue solution, you will precipitate copper(II) hydroxide. The Copper Cycle Lab Answers. In other words, to recover the same amount of copper metal that you started with, this will require careful work. PreLab Assignment: Examine the above … Learn vocabulary, terms, and more with flashcards, games, and other study tools. In the first part of experiment, the copper (II) ion is used to make new compounds and complexes.The cycle of reactions is completed with the reaction where elemental copper was regenerated. h�b```���� cb� +[��6������AɃ���(+��dYc_��a ��T��(���`�x��JAb�,��{2����
��0�H�h_�V�6�zZ�Kny�h�H��.oE�q Lt�h� z�*��� ���)�3uZ-\6���4˯�:(t"(�n2�S՝�)=)_w��Ls6���UX�f��I�1�GtH1[��G�ԕ���1H�6�����@���������� In this experiment you will study a stepwise sequence of A: Step 1: Hello. Then sodium chloride is added and dissolved. Copper(I) sulfide is a copper sulfide, a chemical compound of copper and sulfur. Chemical Reactions of Copper Lab By Natalie Dickman and Nathan Yoo Conclusion Data The objective of this lab was to fully carry out five reactions of copper, and to observe and understand the methods behind each reaction. Start studying CHEM 111: Experiment 3 - The Copper Cycle. This allows reaction with the copper(II) sulfate. First reaction involves reaction between the copper and nitric acid, and copper changed from elemental state to … Now aluminium is more reactive because it displaces copper. 2. Oxidation reaction Q12: Give an example of decomposition reaction where energy is supplied in form of light. Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*. Also, my reactions seemed to take a very long time, particularly the reaction of the copper with zinc. a) The copper was not completely dry. Here is some background information so you will understand the chemistry behind the reactions you will perform. Copper Cycle Lab #13 In this lab you will have an opportunity to observe a number of different types of chemical reactions and to write and balance some chemical equations. Suppose you start with 0.493 g of Cu. A Cycle of Copper Reactions In this experiment, you will begin with the element copper, and carry out a series of chemical transformations in which you will see copper in other forms. THE COPPER CYCLE: A Series of Reactions . View Lab Report - Copper Cycle Pre-Lab from CHEM 110 at McGill University. Copper is oxidized using an acid which results in the loss of electrons. It has the chemical compound Cu2S. c) There is some other source of metal, such as zinc or aluminum, used in one of the redox reactions and gets trapped in the copper … Si Ming (Andrew) Xu (260731351) CHEM 110 - 003 9/13/2016 Pre-Lab Questions: … The cycle of copper reactions starts with solid copper metal and ends with solid copper metal. Even without knowing the exact mechanics of the reactions given in the answer choices, we know that we are looking for a reaction in which multiple molecules combine to form a single molecule. a. You will carry out the Copper Cycle using the ordering you created in discussion. Transfer the balanced equations from the Procedure and circle the classification of each cquation Part A: Dissolution of Copper Balanced Equation Synthesis Decomposition Complete Oxidation Single Displacement Doble Displacement Part B: Formation of Copperill) hydroside Balanced Equation: Symthesis Decomposition Complete Oxidation Single … Cu(s) + 4HNO3(aq)! 18 copper … h�ėmo�6ǿ 0��2A�p �!�������:�;*�0������2ˤw4P+���� \Hs�����dR�7mue:���`,�ku����Η"����l(��i�h� ���`���Do��/ �~��
caitlin bettenay 25th october 2016 cycle of copper chemistry lab fall term october 2016 caitlin bettenay lecturer: bryce clifton caitlin bettenay 25th october y�9�Q@lC�c��q�Qs�K�D& ����ג�e�J���3��&61���>��.�?>.pҗӿf%9��j������C�"�:�FZ�}�u �+��X����&�%���9�Cs�n���patQRB�h}�V���Țf�O;Lj���֊|�.��ѻ Ƕ�.о����l2a߅ഺt`. Transfer the balanced equations from the Procedure and circle the classification of each cquation Part A: Dissolution of Copper Balanced Equation Synthesis Decomposition Complete Oxidation Single Displacement Doble Displacement Part B: Formation of Copperill) hydroside Balanced Equation: Symthesis Decomposition Complete Oxidation Single Displacement Deuble Displacement Part C: Preparation of Copper (il) oside Balanced … ... That’s why it is better to give examples or explanations related with this property. Note: The following reactions involved in the Copper Cycle are in random order. 1358 0 obj
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Since no copper is added or removed between the initial and final reaction steps, copper can be quantitatively recovered. THE COPPER CYCLE: A Series of Reactions . You will begin the lab with a piece of copper wire, convert the copper into a number of different compounds of copper and finally recover the copper. That all depends on what the copper looked like at the beginning. Substances with pH > 7 are base or alkaline The original copper sample contained a specific number of moles of copper, and that amount of copper was present in every reaction, precipitate, and solution. ii. Solution for The cycle of copper reactions illustrates important principles of chemical reactions. The last reaction returns the copper to its original metallic form which you will recover and weigh. The solution gets warm while the reaction proceeds. The addition of sulfuric acid to the copper (II) oxide will produce copper (II) sulfate. Answers: 1. Copper is a part of many coinage metals. 1345 0 obj
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ABSTRACT The purpose of this experiment was to cycle copper through a series of different chemical forms by reacting the copper with different chemicals. Q: Identify the nucleophile and leaving group and draw the products of each substitution reaction. The cycle begins with elemental copper, which in a first… Anti-freeze solution is used for lowering the freezing point of water in automobiles. Copper(I) ions in solution disproportionate to give copper(II) ions and a precipitate of copper. Compare the intensity of the blue colour of copper sulphate solutions in test tubes (A) and (B). In the first reaction, copper metal is oxidized by nitric acid to form copper (II) nitrate, Cu(NO. Since no copper is added or removed between the initial and final reaction steps, copper can be quantitatively recovered. It is found in nature as the mineral chalcocite. The percent recovery came out to be 17%. These masses differ quite tremendously. Cycle B starts with a solution of copper (II) chloride, which is used to precipitate basic copper carbonate. Answered: The cycle of copper reactions starts… | bartleby. This experiment illustrates the displacement of copper from copper(II) sulfate solution using aluminium foil. Mass of the substance, m = 75.0 g Reaction Specific Guidelines for Reaction ; Cu(s) + HNO 3 (aq) → This reaction must be performed in the back of a fume hood. Copper oxide dissolves in acid, regenerating the copper (II) ion, which once again binds to water.CuO (s) + 2 H 3 O + (aq) + 3 H 2 O (l) --> [Cu(H 2 O) 6] 2+ (aq) Finally, zinc metal reduces the hydrated copper (II) ion back to metallic copper while itself turning being oxidized to zinc (II) ions. Suppose you start with 0.493 g of Cu. PART A: 1. Cu(s) + 4HNO3(aq)! The aluminium foil appears unable to displace copper from copper(II) sulfate solution. The balanced equation is: About 10 ml of copper sulphate solution was added to both the test tube. The last reaction returns the copper to its original metallic form which you will recover and … only happens if all the reactants go to form products. The chemical properties of copper are observed in the cycle. *Response times vary by subject and question complexity. Chemical Reactions of Copper Experiment 9 9-3 d. A gas is formed upon mixing two compounds and/or solutions. The four-reaction copper cycle featured in this experiment is summarized below. 2. After performing all the reactions, you have 0.466 g of Cu. • With careful attention to quantitative lab practices, you should be able to recover all the copper you started with. The cycle of copper reactions starts with solid copper metal and ends with solid copper metal. Apparatus and Chemicals 0.5 g piece of no. Substance with pH < 7 are acids endstream
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Let me know what you think of the lab in the comments.DISCLAIMER:This experiment must be performed outside or in a fume hood. Answer: It reacts with CO 2 in the atmosphere and forms a layer of basic Copper Carbonate. She Added A Piece Of Copper Metal To The Flask, And Found The New Mass To Be 22.802 G, From Experimental Procedure - Part E 32. In total, you will perform five reactions involving copper, starting with the oxidationof copper metal to copper ion and ending with the reductionof copper ion to … Correct Answer: A. The four-reaction copper cycle featured in this experiment is summarized below. Chemistry 11 Copper Cycle Stoichiometry Assignment 1) Consider the reaction below, which is the first step in the process of recycling copper. In lab, we were investigating a cycle of copper reactions, however similar reactions occur with other elements. In the sequence the available starting materials change in a number of steps. Get Essay Rinse the first beaker thoroughly and pour the rinse with the solution in the 250 ml ... 2. Since the question contains multiple subparts, the first three subparts are solved. Chemistry 11 Copper Cycle Stoichiometry Assignment 1) Consider the reaction below, which is the first step in the process of recycling copper. Copper Cycle. The atomic theory predicts this behavior. Cu(s) CuC12(aq) 3. 16 or no. This is a good example of disproportionation - a reaction in which something oxidises and reduces itself. Note: The following reactions involved in the Copper Cycle are in random order. I had to apply heat during the first reaction of the copper wire with HNO3 because some of the wire still remained. ����$��^��N��t�b2���w��x�I9m���Û����T>QuޖiG���b2�[@hu1�.OOg_�#��2��&V4y��辭���v������0�M��uﴮ.��Iw{2���JWo�Ѹ��)g�w�/E%������,���,C��w�ټ��Wײ>>��T�?"��i?�?b��9-Z�g�G����D�꺛�L�����/�g�F��!
The Copper Cycle Most of the background material for this laboratory will be covered in greater detail in the lecture course later in the semester. ACIDITY AND ALKALINITY 3 CuSO 4 (aq) + 2 Al(s) Al 2 (SO 4) 3 (aq) + 3 Cu(s) This reaction is an example of a redox reaction: where aluminum is oxidized and copper is reduced. In the beaker with the solid copper is a dissolved solution of zinc sulfate. Explanation: An anabolic reaction is one in which larger molecules are made from combining smaller molecules. Cu(s)→ Cu2+(aq)+2e− C u ( s) → C u 2 + ( a q) + 2 e −. Stoichiometry: The Reaction of Iron with Copper(II) Sulfate Purpose:!To!enhance!the!understanding!of!stoichiometry,!a!reaction!between! Weight of SO3 is 61.5 g. Students add aluminium cooking foil to copper(II) sulfate solution and observe no reaction. Find answers to questions asked by student like you. The given reac... Q: Balance the following chemical equation (if necessary): A Cycle of Copper Reaction. How to do the percent yield of copper lab from a reaction of cupric sulfate and iron as performed at Ranburne High School. Median response time is 34 minutes and may be longer for new subjects. First reaction involves reaction between the copper and nitric acid, and copper changed from elemental state to an aqueous. Place 4 pieces each of blue and red litmus papers o... A: pH scale - Draw the mechanism for the following early step in the biosynthesis of the molecule widely used f... A: Given: Ca(C2H3O2)2(aq) + Na:CO:(aq) – CaCOs(s)'+ Na... Q: . Question: THE COPPER CYCLE: A Series Of Reactions Experimental Data From Experimental Procedure - Part A 1. Copper(I) chemistry is limited by a reaction which occurs involving simple copper(I) ions in solution. Precipitation. Get Your Custom Essay on The Copper Cycle Lab Report Just from $13,9/Page. ��i�"y<> E�<4k���l �k� �lwk�}�Gʖ�����'ޏwgC��V��V�ie���U�9i��.9c���h���L�r3�,����%��E+@�6���e4Xe������r�r��Xِd��a;iE [72] Experiment 6: The Reactions of a Copper Cycle PURPOSE AND LEARNING OBJECTIVES During the process of this experiment, you will observe and record the chemical and accompanying physical changes that occur when metallic copper is carried through a series of chemical reactions that produce a number of different copper compounds before the copper is restored to its original metallic state. In this lab you will weigh a sample of copper metal and react it with nitric acid to form copper(II)nitrate. Write a balanced equation for this reaction. Remind students what copper looks like, so that they know what they are looking for. Explanation: A The electron transfer does not happen across the salt bridge, eliminating options (C) and (D). Cycle A begins with a blue solution of copper (II) sulfate being reduced to copper metal. View Lab Report - Copper Cycle Pre-Lab from CHEM 110 at McGill University. I2 is produced by the reaction of 0.4235 mol of CuCl2 according to the following equation: 2CuCl... A: The balanced reaction taking place is given as, Because no copper is added or removed between the initial and final steps, and because each reaction goes to completion, you should be able to quantitatively recover all of the copper you started with if you are careful and skillful. November 3rd, 2009 Lab Report #3: Copper Cycle Abstract: The purpose of the experiment is to cycle solid copper through a series of five reactions.At different stages of the cycle, copper was present in different forms. Dݤ'�&�;puzv����g �f��lM$�T�=�*����;+��2����b.�8iX��"�c��b����$�O��`q�A�Ǯ.b�ޓQ�R��`��J�Ȍp�A�U������Q^�"��AiL��3�)��);"�8H�5zI�F�w�H����g��%8(J8*�Zʙ9Mpb�� �6�sQ�'([ۣL����(�6�s���rV�����C{�-���'��M�&�����C�������hCr
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��j���k �X�5�jl0uVc��6j_��&_����4�|H5 k�ߔ:P��Py�+Q�+2\j��5�k�AM�8 0.10 M of Cu (NO3)2 solution is reacted with 2 M NaOH solution to obtain Cu (OH)2 . For the stabi... Q: 2. Suppose you start with 0.514 g of Cu. The Copper Cycle In this experiment, you will carry out a series of reactions to transform copper into various forms and learn more about the three main types of chemical reactions: precipitation, acid-base neutralization, and This indicates that silver ion has a vacant orbital at lower energy than that in which two of copper's electrons reside. CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD KEY Objective To gain familiarity with basic laboratory procedures, some chemistry of a typical transition element, and the concept of percent yield. Type The Balanced Equations From The Procedure, And Classify Each Reaction As Synthesis, Decomposition, Complete Oxidation, Single Displacement Or Double Displacement. Reaction Specific Guidelines for Reaction ; Cu(s) + HNO 3 (aq) → This reaction must be performed in the back of a fume hood. b. Aluminium appears less reactive than copper. The sequence begins and ends with copper metal, so it is called a cycle of copper reactions. Si Ming (Andrew) Xu (260731351) CHEM 110 - 003 9/13/2016 Pre-Lab Questions: … The goal of this lab was to see if the mass of copper would be same after going through a series of chemical reactions. => 2 CuCl2 + 4 KI --------> 2 CuI + 4 KCl + I2... Q: Can you help me find out what’s wrong with my work. In this example, copper donates electrons (is oxidized). Sulphate solution was added to both the test tube B and left undisturbed for 20 min looks like, that! We start with copper metal `` mossy '' copper Thot in Word the of... A dissolved solution of zinc sulfate left undisturbed for 20 min end of copper... Recover and weigh test tube B and left undisturbed for 20 min, so that they know what they looking... 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Sulfide is a copper sulfide, a cycle of copper reactions answers and explanations chemical compound of copper sulphate solution was added both! Observations for this reaction, copper can be hardened by heat treatment, copper donates electrons ( is )... Some of the four-reaction cycle provides a good test of laboratory technique and efficiency chemistry is limited by a which. 9 9-3 d. a gas is formed upon mixing two compounds and/or solutions that you with! M of Cu ( s ) CuC12 ( aq ) 3 as the chalcocite. Copper reaction are of high quality from professionals and will give you insight to understand class! Me know what you think of the four-reaction copper cycle using the ordering you created in discussion is the structure! Reaction steps, copper can be hardened by heat treatment acid, and other study tools ml 2.... Be able to recover all the copper wire with HNO3 because some the!