Water Project Final - Dicsuccion Water Project: The...

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Dicsuccion Water Project: The divalent metal ions present in our sample correspond to the significant values that we measured in our complexometric titration experiment. In our titration the moles of EDTA used will be equivalent to the amount of divalent metal ion moles in our solution. In this titration, the +1 metal ions that we were measuring for correspond to Li+, Na+ and K+, each of which was measured to be around .00422 M for floor 1, .00655 M for floor 2, and finally .00977 M of divalent ion contained in floor 3. These results show a steady increase of divalent ions as the floor increased, hinting to a notion that as the you go up a story, the more piping you need to run through and more ion concentration runs off into the water sample. This measurement of significant high metal ions corresponds to where the water sample was taken from, for water fountains from the old chemistry building will present many metal ions that have been in the piping and also the fountain itself. I am confident in my answer for the significant difference between the 3 floors molar value should have shown some fluctuation. There may be some different amounts of metal ions between separate floors of one building, proving that the higher one gets in the building, the more metal ions present in the water. Thus, I am so confidant that these values for each floors divalent metal ion concentrations are correct. The reason that EDTA is used as a common component in tile cleaners is because it can bind to the more complex metal ions, such as Ca 2+ and Mg 2+ ions, and thus form a precipitate to be easily broken down. Because EDTA can bind to these ions, it allows for easy cleaning of tile that is saturated in these metal compositions. Many bathroom tile cleaning companies have begun to see the use of this metal ion binder and use it to the
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advantage of making cleaning tile a lot easier to do. In our second experiment out our water samples, ion-exchange chromatography was preformed in order to measure the molar concentration of positive charges present. By running the sample through the resin column, it replaces the cations with hydromium ions, which will force the reaction to the left. This reaction will show the amount of hydromium ions contained in our water sample, which is equal to the number of positive charges in the sample as well. For this chromatography test, the measured values for each of the 3 separate floors [Mg 2+] values were: .00318 M, .0055 M, and .0085 respectively for increasing floors. The amount of positive ions in our water samples were all relatively similar, and present the notion of these ions present in the same source that each sample came from. Because each molarity is around the same consistent value, these values seem to be accurate, with none suspecting of difference. By running calcium and magnesium ions through a magnetic field, this will in
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This note was uploaded on 07/01/2009 for the course CHEM 152 taught by Professor Grall during the Spring '08 term at University of Arizona- Tucson.

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Water Project Final - Dicsuccion Water Project: The...

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