a sequence of chemical reactions transforming copper
Theoritical basic : Mass of copper wire after vigorously scouring: .518g To identify the species being oxidized and reduced in oxidation-reduction reactions and determine which species is the oxidizing agent and the reducing agent. Not only will this lab teach you much about chemistry, it also gives you practice in many of the laboratory skills we have learned during the course of the year. reaction of copper and silver nitrate, and calculate Purpose : The experiment was also demonstrated to observe how copper reacts while different reagents were being added. Briefly describe. uq�y�.���U�F�7��A�^��M���R�=2=d7��$\���t�ٞ5$�L� Chemical Reactions Lab A small quantity of copper will be carried through the following transformations: Cu → Cu(NO3)2 → Cu(OH)2 → CuO → CuCl2 → Cu3(PO4)2 → CuSO4 → Cu. n Premium Thick brown gas formed. The reaction between Cu and HNO3 produces NO2, a toxic brown gas; therefore working under the fume is necessary in order to prevent inhaling the toxic gas. Catalyst: substance that increases the rate of a chemical reaction by reducing the activation energy, but which is left unchanged by the reaction. Premium is subjected to a sequence of reactions. Objectives: 1. Mole Ratio of a Chemical Reaction: Washing with isopropanol will reduce the time needed for the drying step. their mole-to-mole ratio. 6 Pages. Ice water is used as an absorber for the heat released in this reaction. 1)a-Nitric acidreacts with copper according to the reaction: 4HNO3(l) +Cu(s) ==>Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l) The copper nitrate salt that forms is a deep blue color. "#$% To recycle a sample of copper! To identify the chemical changes formation of silver metal will be used to write the Illustrate variety of substances of which an element can be part: We should recover as much copper as we started with. Hydrogen, Sodium chloride, Hydrogen chloride 795 Words | Premium Premium �@T� '�]��rɥo5cx؟to�1�����Y|�3 �6h� ^�Ia�Rj8k ul�����-�LA�6m�4���k-��j���/o��/��_!�h��[�*�������� ��8�� � ߺ��*�ûf��+�eo�=8������Q�?R����T�˜^����>�Z�Ǐٶ� �� ��� -y�&�ӂ�H�o)O8� �b�xf��U����Ù_�Ɇ2�-��I|��|U༱�^��c��Ϳ2�7����� �-,�K{��p���% K0j�G���K� (�n endstream endobj 11 0 obj <>stream Copper & Silver Nitrate relating to the disappearance of copper and the �.�]}����g���S���3��I�M�9J ���d� 5��)[ �~ �i����dA���-W^�!P)0kp��E���_ܶ����oiJd����PB��P�}(��B)�끒�E �)L��t�zʒ&U/���+4��4�Wh��4�F�8�Ρ;�CX��b�p�״��oE��R�s�:q��m�^�JR'�r��+H �a'ԷQ�oTƋp'ڦ7ڭ�j�rG�y��=�K�t�q�|�E9| �����*S�k ��6p�<4�C/˗b&,�u����'}}�^�ׁ��@ve��V��N��2�+k����f���k��[B_w���y6�9�K,�%�p.��wx� �p���\m/�������Ε^P[��CT�Qx��e The solution starts out acidic because of excess nitric acid from the previous step, so the first OH- added goes into neutralizing the acid; once the acid is neutralized, the next OH, Add water to the reaction mixture obtained in the previous step, and. Finally, zinc metal reduces the hydrated copper. 3 Pages. A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. After a blue precipitate is formed, periodically test the acidity of the solution by dipping your stirring rod into the solution and touching it to red litmus paper. Experiment 3 Observations of Copper (II) ribbon mixed with HNO3: Solution turned green. In this experiment, you will determine the number of H��UM��0��W��#�?�8Y�HK�8,�-uw�ma۔��ϼ���9���c{���x�\M�j���?�?l&W�i멟\��F���-��&����Z畱�]O�m���h�5�>�. Petroleum, Sulfuric acid, Filter paper 654 Words | �"%�\�7�HM�Db4hXh@% �B�#��D1q�G�`��4�C?L$E@̤-'J�8� B�,�aB��ض��#���pxђ�(F��? 3 Pages. n To identify the products formed in these reactions and summarize the chemical changes in terms of balanced chemical equations and net ionic equations. (SYNTHESIS REACTION, DECOMPOSITION AND Copper is one of the most important metals. b) Why you should be particularly careful when you work with 3 M H2SO4 solution? 2. CHEMICAL REACTION The copper reaction experiment was demonstrated by adding the reagents like 16M HNO3, Distilled water, 6M NaOH, 6M H2SO4, Acetone, Zinc metal and Methanol into the beaker with the copper wire. Avoiding skin contact or inhalation is highly important. conversion of reactants into products, the structure that results at the maximum energy point along the reaction path. Chemical equilibrium, Chemical kinetics, Chemical reaction 648 Words | 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. Premium 3 Pages. Keep the solid on the filter paper, and discard the filtrate. Combustion– An element reacts with oxygen to form an oxide (this is also a Synthesis) A compound consisting of carbon, hydrogen and/or oxygen (C8H18is called octane) reacts with oxygen to form carbon dioxide and water. Introduction h�mo�8���?�:��n�Ҫ�m�tl��{=�C form, but the reactions will turn it into free Cu+2 ions floating in solution. The reaction between copper and nitric acid is an exothermic reaction. To examine a variety of reactions including precipitation, acid-base, gas forming, and oxidation-reduction reactions. Cu(OH)2 (s) + NaNO3 (aq) B. Cu(OH)2 (s) ! Activation energy: a chemical reaction is the difference between the energy of the activated complex and the energy of the reactants. Premium h�b``e``2g```�1d@�@���р,& Part I: Preparing a solution of copper (II) nitrate Data: Avoiding skin contact or inhalation is highly important. A Sequence of Chemical Reactions: Transforming Copper SINGLE REAPLACEMENT REACTION) Premium Lab #4 Compute the percent of copper recovered. Sulfuric acid solution is corrosive and will sting skin with which it comes into contact. &'"()*+'#$%,"-).% Step 2: Make a compact ball out of the copper ribbon. (Make sure you use 0.35 – 0.40 g of copper. Cu(NO3)2 (aq) + 2NO2 (g) + 2H2O The remaining 4 reactions follow the following equations: Balance each of these: A. Cu(NO3)2 (aq) + NaOH(aq) ! A Cycle of Copper Reactions Be careful with the nitric acid: like other strong acids, it will sting if you get it on your skin and can damage clothing; unlike most other acids, it will also stain the affected area yellow. REAC 480—A Sequence of Chemical Reactions: Transforming Copper Lab Notes ! 3 Pages. Concentrated nitric acid is a toxic oxidant. 7 Pages, "A Sequence Of Chemical Reactions Transforming Copper", INTRODUCTION This experiment was to recover the most amount of, you carry out the oxidation of Cu with HNO3 in a fume hood? ------------------------------------------------- 6 Pages. Chemical Reaction of copper compounds INTRODUCTION This experiment was to recover the most amount of copper after it To observe the effect of temperature of a chemical reaction. We have seen this reaction before in the copper chloride lab). n h�bbd```b``�"l�� ��D2�,`�0 �eN��م`�DrG�����g@$c;��p��uA����H2���?�10�3 l#]���� �nX endstream endobj startxref 0 %%EOF 51 0 obj <>stream Chemical reaction, Chemical equation, Equations 1382 Words | The process starts with a solid copper wire dissolved in nitric acid and the end product is copper powder. That is to say that the products of each chemical reaction were used in the next reaction. Add the NaOH solution dropwise to the copper solution. ------------------------------------------------- a) Why must you carry out the oxidation of Cu with HNO3 in a fume hood? n ABSTRACT 3. Premium Same amount of copper present at every stage: same number of moles. 1. 2. moles of reactants and products present in the The Copper Cycle Experiment - A Series of Reactions - YouTube moles of reactants and products present in the, StudyMode - Premium and Free Essays, Term Papers & Book Notes. It is important to carry out this step in the fume hood because the brown NO. If the weighing paper has a mass of around 0.25 g, then In this experiment, the objective was to conduct a series of chemical reactions that contain copper or copper compounds. Sulfuric acid, Oxidation state, Redox 580 Words | Chemical reaction, Sulfuric acid, Stoichiometry 1330 Words | 4. The, determine the number of n Dry the copper over a beaker of boiling water as described in the procedure (E). Oxidation and Reduction Reactions: The Reactions of Copper The copper is originally in solid OBJECTIVE Premium Copper (II) bubbled vigorously. The mole-to-mole ratio }���|�"�W�%�WaB��g���O��)��N��PM#��YG����fZ�eD����q��0�]���8}>/�����9�=�E�o���):���u�@L�3(��,���h��O\/���(~~)�����J�B2C��� �^giyu���]h�$��y�Q�l���*N6g�0�����ꋓH�����":����m�[�yq�%K/��yT.^oa�c�*������I�N+�՟NV� Initial mass of copper wire: .520g Sulfuric acid, Ammonia, Acid 565 Words | 3. During this The nitroge view the full answer Be careful not to cut yourself—the edges are sharp! balanced equation for the reaction. Experience in standard chemical techniques: filtration and quantitative transfers. Chemical Transformations of Copper 1. Weigh the dry copper and record the mass. Wash the copper metal three times with distilled water and transfer it to an evaporating dish as described in the procedure (part E), and then wash it three times with 5-ml portions of isopropanol. �6���${Z���8/(mu�(�x�{�q"9aD Cu (II) dissolved, solution appeared green/blue. If some copper remains undissolved by the time the production of gas is finished, then put the beaker on the hot plates in the hoods to hasten the reaction. ���LlB�7)8��t�ͅ�O���?��=�ǵv�J>� ����h� b,�@� ��� endstream endobj 8 0 obj <> endobj 9 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/Type/Page>> endobj 10 0 obj <>stream The Sequence of Chemical Reactions 1st Year Practicals %PDF-1.5 %���� The copper is originally in solid form, but the reactions will turn it into free Cu+2 ions floating in solution. The function of using the ice bath in this step is to control the temperature of the reaction, because the reaction may become too violent if nothing is used to cool it down.
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