copper lab - Conclusion: The purpose of this lab was to...

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Conclusion: The purpose of this lab was to determine the mass present of an unknown sample of a copper containing compound made from a known mass of a copper containing compound, copper glycinate. This was accomplished by performing a titration with thiosulfate. The application used in this experiment is a secondary redox analysis. This means the copper (II) was not analyzed directly. The titrate analysis for the presence of a reactive species, a byproduct of copper (II)’s presence. Copper (II) reacts with iodide ion in the following reaction: 2Cu 2+ + 5I - → 2CuI + I 3 - All the copper was converted to CuI and an amount of triiodide ion I - 3 and iodine was produced in the solution in a stoichiometric amount. This was comparative the amount of copper (II) there was present initially. There was a relationship between the number of moles of copper (II) and the number of moles of triiodide. The thiosulfate ion consumed all of the triiodide that was present according to the following equation: I 3 - + 2S 2 O 3 2- → 3I - + S 4 O 6 2- . Although indirect, there was an established connection between moles of copper (II) and moles
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copper lab - Conclusion: The purpose of this lab was to...

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