In this poem‚ the poet describes a contemporary war which was more intense than those in the old days and the hopelessness for soldiers to come back from the war. When the speaker got the news that his friend‚ who saw service in that war‚ was coming back‚ he was then in an emotional conflict between the eagerness to see his friend returning from the war and the worry about if his friend was still alive or not because he understood the cruelty of the war. A possible theme of this poem is the senselessness
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calculate a theoretical yield of CuO‚ and your actual yield. You then will calculate a percent yield. Copper(II) sulfate pentahydrate will be dissolved in water and reacted using a double replacement reaction with sodium hydroxide. The addition of hydroxide ions to a solution containing copper(II) ions results in the precipitation of copper(II) hydroxide. Subsequent heating of the copper(II) hydroxide results in decomposition to copper(II) oxide and water. The CuO can be quantitatively filtered
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temperature of a Bunsen burner flame‚ whereas the carbonates of silver and copper are easily decomposed. In this experiment copper (ii) carbonate will be decomposed at a high temperature‚ forming copper (ii) oxide and carbon dioxide: CuCO3(s) arrow CuO(s) + CO2(g) You will test for the formation of copper (ii) oxide and carbon dioxide. Limewater is a sensitive test for CO2‚ forming a distinctive milky precipitate: CO2(g) + Ca(OH)2(aq) arrow CaCO3(s) + H2O(l) Calcium carbonate is strongly heated
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following terms as it relates to this experiment. a) Decant: After reactions in parts III and V are complete‚ we isolate the metallic Cu and the CuO and we decant or pour off the supernatant liquid. b) Filtrate: The liquid that passes through the filter in the step V will be the filtrate. c) Supernatant liquid: The liquid above the settled precipitate of CuO in part III and Cu in part V. In these cases the liquid decanted. 3. Write the chemical equation(s) for each part of the following terms as
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LAB REPORT FOR EXPERIMENT 3 COPPER CYCLE OLANREWAJU OYINDAMOLA TUESDAY 27TH February 2013 Abstract This experiment is based on copper‚ to synthesize some copper compound using Copper (II) nitrate solution to obtain copper metal at the end. Changes of copper complexes when various are added and filtering out the precipitate by using Buchner funnel for vacuum filtration .The experiment started with preparation of copper (II) hydroxide and addition of copper oxide then addition of droplets
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Decomposing Copper Carbonate Mass of Crucible (g) Mass of CuCo3 added (g) Mass of Crucible + Copper Oxide (g) Mass of CuO produced (g) 0.00 0.25 0.50 0.75 1.00 1.25 What happens to the mass of the copper carbonate when it is heated? Give a conclusion‚ which describes why the mass of copper carbonate may have changed during your experiment. When the copper carbonate is heated it decomposes forming copper oxide and carbon dioxide. The copper carbonate turns into a
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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. In this experiment I performed a series of reactions starting with
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The supernate was then filtered through the use of filter paper into the Erlenmeyer flask. The filter paper having the copper (II) oxide solid used was washed with 6.00M H2SO4 thus having a reaction of: CuO(s) + H2SO4(aq) CuSO4(aq) + H2O(l) It was noted that from the colorless or clear filtrate‚ it changed into blue. Also‚ there was a formation of blue precipitate when 6.00M H2SO4 was added. The CuSO4 solution obtained was then added with zinc dust
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Aim: The aim of this experiment is to convert copper metal through a series of intermediate copper compounds back into copper metal. By weighing the copper at the beginning and at the end of the experiment the percentage yield can be determined. Method: The experiment was carried out as outlined in the practical manual. Results: Table: showing masses: Mass copper wire 0.2510 Mass crucible 28.9257 Mass watch glass 19.6213 Mass watch glass + copper 19.7890 Mass copper
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and nitric acid‚ and copper changed from elemental state to an aqueous. The second reaction converted the aqueous Cu2+ into the solid copper (2) hydroxide. In the third reaction Cu(OH)2 decomposed into copper 2 oxide and water when heated. When solid CuO reacted with sulfuric acid‚ the copper returned to solution as an ion (Cu2+). The cycle of reactions was completed with the reaction where elemental copper was regenerated by Zn and Cu exchanging states in acidic solution. Data: Reaction 1: Mass
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