Percent Copper in Brass Background The scientific concepts involved in this lab include Spectroscopy‚ Beer’s law‚ Calibration curve‚ concentration‚ and electronic transitions. The main objective of this experiment is to see how the percent composition of brass can be determined to verify the properties influenced by copper and zinc. Brass is a generic term for alloys of copper and zinc. The main technique used in this experiment is Spectroscopy. The three equations used in this lab are: Y = mx
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Copper Chloride Lab Report Procedure Part A: 1. Pick up the container of copper chloride dehydrate‚ and observe material. Describe crystals in detail‚ and write down all of the observations. Part B: 1. Take a 100 ml beaker and fill ¼ of it with water. Use a spatula to add some copper chloride dehydrate to the beaker filled with water. Record the observations. Be sure to observe the water and the copper chloride dehydrate. 2. Stir the contents in the beaker with
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The primary objective in the lab is to determine the molecular formula of Copper Oxide through synthesis of copper oxide. In the first procedure‚ an empty crucible‚ Bunsen Burner‚ and electronic scale were placed onto the workbench. The electronic scale was zeroed before the crucible was placed on it. The total mass of the empty crucible was 88.000g. Afterwards‚ 10 grams of copper powder was placed into the crucible and weighed to be 98.000 g. The crucible with the copper was placed onto the Bunsen
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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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experiment‚ synthesis of copper compounds‚ the purpose was to recover the original amount of copper after series of chemical reactions. Then returning the copper back to its original form. The copper wire originally weighted 1.0099 g‚ but after the copper was transformed into Cu(OH)2 to CuO to CuSO4 and finally into Cu‚ the mass of the recovered copper was 1.1023g; the percent yield was 109%. Since the percent yield is more than 100%‚ an error must have occurred somewhere in the lab. A possible error could
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Moles of Iron and Copper Lab Data and Observations Before the reaction: Mass of empty‚ dry beaker: 153.44g Mass of beaker + copper (II) chloride: 161.44g Mass of two iron nails: 7.27g After the reaction: Mass of two iron nails: 6.29g Mass of beaker + copper (dry): 154.50g Questions and Calculations 1. a) Mass of two iron nails before the reaction – Mass off two iron nails after the reaction = Mass of iron used in the reaction = 7.27g – 6.29g = 0.98g
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Analysis: Copper Lab 1) Calculate the mass of the copper that was recovered 2) Use the formula shown below to calculate the “percent of recovery” of copper for your experiment. 3) Use the proper symbol and formula to write balanced equation for each of the five copper reactions‚ include state symbols. 4) Classify each of the five copper reactions. (Refer to the above order‚ please!) A) Single Displacement B) Double Displacement C) Decomposition D) Double displacement E) Single Displacement
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may affected the mass of the copper was recovered and also the percentage of yield. According to the law of conservation of matter‚ the mass of the copper will not change even though there are many chemical reactions happened which also mean that the mass of copper contained in solutions or precipitates remain the same as the copper in the beginning. And it is necessary to synthesize the various copper compounds in order to recover metal because the amount of copper might be left due to some errors
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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 product 0.1677 Calculations:
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Copper Sulfate Pentahydrate Purpose: To verify the formula for copper (II) sulfate pentahydrate by measuring the amount of water decomposed from the hydrated species. MSDS: Copper sulfate pentahydrate- Harmful if swallowed. Causes skin irritation‚ causes serious eye irritation. Very toxic to aquatic life with long effects. If copper sulfate stays in the stomach‚ the victim becomes unconscious. The symptoms of poisoning include diarrhea‚ headache and injury to vital organs. Background: 1
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