States of Matter Sleuth

States of Matter Sleuth - Alec Hildreth Bryan Ringstrand...

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Alec Hildreth 2.4.38 Bryan Ringstrand Mon., 5:00 States of Matter Sleuth Introduction The goal of this lab was to determine which of four unmarked substances was an ionic compound and what its cation was. The methods used to determine the ionic compound were visual inspection, conductivity, and ion exchange chromatography. It was known that there was one pure element, one covalent compound, one heterogeneous mixture, and one ionic compound. After the ionic compound was found, ion exchange chromatography was used to determine its cation. Procedure Samples of the four unknown substances were obtained and analyzed. The pure element, in jar A, was determined by visual inspection along with the heterogeneous mixture, in jar D. Samples of the two remaining substances were dissolved in water and tested for conductivity. The substance in jar B proved to be nonconductive, making it the covalent compound, while jar C was highly conductive, making it the ionic compound. Having found the ionic compound, two samples of it, one having mass of .1520 g and one with mass .1224 g, were taken and dissolved in 10 mL of DI water. This solution is run
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States of Matter Sleuth - Alec Hildreth Bryan Ringstrand...

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