CobaltNickel - should be used to report...

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Chem 223 Spectrophotometric Determination of Cobalt and Nickel Simultaneous Determination mg Ni in original unknown solution in 100.0 mL volumetric flask mg Co in original unknown solution in 100.0 mL volumetric flask Column-separated Determination mg Ni in original unknown solution in 100.0 mL volumetric flask mg Co in original unknown solution in 100.0 mL volumetric flask Data Solution # Concentration Species (M) Absorbance Absorbance 1 0 blank 2 Ni 3 Ni 4 Ni 5 Co 6 Co 7 Co 8 xxx Unseparated xxx Co and Ni 9 xxx Ni eluate 10 xxx Co eluate Nickel Standardization Curves Provide the Molar Absorptivities: from 470 nm data from 518 nm data The concentration obtained from the higher molar absorptivitiy is the most reliable and
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Unformatted text preview: should be used to report your "column-separated" answer. Cobalt Standardization Curves Provide the Molar Absorptivities: from 470 nm data from 518 nm data The concentration obtained from the higher molar absorptivitiy is the most reliable and CoL 2 NiL 2 λ =470 nm λ =518 nm M-1 cm-1 at 470 nm M-1 cm-1 at 518 nm Calculate [Ni 2+ ] in solution #9 from each of the the working curves: M-1 cm-1 at 470 nm M-1 cm-1 at 518 nm Calculate [Co 2+ ] in solution #10 from each of the the working curves: should be used to report your "column-separated" answer....
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This note was uploaded on 01/06/2011 for the course CHEM 223 taught by Professor Scheeline during the Fall '08 term at University of Illinois at Urbana–Champaign.

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CobaltNickel - should be used to report...

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