Abstract: The purpose of this lab was to use potentiometry to measure the concentration of a specific chemical species in a solution. This was conducted in 2 stages. The first stage involved making a solution of potassium iodide. The potassium iodide was then diluted to several different concentrations that were ran in potentiometer to find the mV of each solution which would then be used to find the PH of the solution. After analyzing a sample of each concentration an unknown solution was compared
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Solder (/ˈsoʊldə/‚[1] /ˈsɒldə/[1] or in USA /ˈsɒdər/[2]) is a fusible metal alloy used to join together metal workpieces and having a melting point below that of the workpiece(s). Soft solder is typically thought of when solder or soldering is mentioned‚ with a typical melting range of 90 to 450 °C (190 to 840 °F).[3] It is commonly used in electronics‚ plumbing‚ and assembly of sheet metal parts. Manual soldering uses a soldering iron or soldering gun.Alloys that melt between 180 and 190 °C (360
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The Capuchin Catacombs of Palermo Sicily’s Catacombs of Capuchin‚ located directly under the Capuchin Convent is the ultimate museum of the macabre. Indeed‚ the Catacombs of the Capuchins are ancient burial catacombs‚ located in Palermo‚ Sicily‚ southern Italy. The bodies of eight thousand souls line the corridors of the catacombs‚ as their disembodied shells are propped up against the walls‚ or resting in open caskets for the entire world to view this gruesome display that is open to the public
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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 during the experiments and the unreacted Zinc which still exist with recovered Copper which cause the percent yield increased. Besides‚ during the experiments‚
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Pennies is 8.17. This means that although the penny’s density is close to that of copper‚ the penny is not all copper‚ but an alloy made up of different metals‚ but primarily of copper. 4. The density of the Post-1983 Pennies is 7.11. The metal Zinc is close to having the same density as these pennies because it has a
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Analytical Chemistry Daniel C. Harris: 7-4‚ 8‚10‚12‚16 7-4) A 1.000g sample of unknown analyzed by Reaction 7-2 gave 2.500g of bis(dimethylglyoximate) nickel(II). Find the wt% of Ni in the unknown. 7-8) The man in the vat. Once upon a time‚ a workman at a dye factory fell into a vat containing a hot concentrated mixture of sulfuric and nitric acids‚ and he dissolved! Because nobody witnessed the accident‚ it was necessary to prove that he fell in so that the man’s wife could collect his insurance
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toys. Parts can be as simple as a sink faucet or as complex as a connector housing. |[pic] | |Die cast parts are found in many places around the home. The polished‚ plated zinc | |die casting in this kitchen faucet illustrates one of the many finishes possible | |with die casting. | |
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have the some disadvantages but we can easily replace rotten fruits and vegetables with a new one for there is an abundance of fruits and vegetables around us. The energy for the battery comes from the chemical change in the zinc when exposed to the acid and potato. The zinc is oxidized inside the lemon‚ exchanging some of its electrons with the acid in order to reach a lower energy state and the energy released serves as the power. The reason is that there is no such thing as electricity found
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trials for the silver metal produced an average density for all trials of 5.90 grams per cubic centimeter [Processed Data Table: Density of the Silver Metal]. I decided that the metal must be zinc‚ as although it was similar in color to both aluminum [literature value: 2.7 grams per cubic centimeter] and zinc‚ I resolved that its density was closer to that of zinc’s‚ whose literature value is 7.1 grams per cubic
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* iron containing minerals include hematite (Fe2O3)‚ magnetite (FeO·Fe2O3 or Fe3O4)‚ limonite (FeO(OH)·nH2O) and siderite (FeCO3) Alloys: * homogeneous mixtures of metals or metals and non-metals * examples include brass (65% copper‚ 35% zinc)‚ solder (63% tin‚ 37% lead)‚ bronze (85% copper‚ 15% tin) * usually alloys resist corrosion‚ and can be harder than either of the metals * the added species interferes with the metallic lattice of cations in the pure metal‚ and as a result
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