Ligand X forms a complex with both cobalt and copper, each of which has a maximum absorbance at 510 nm and 645 nm, respe

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Ligand X Forms A Complex With Both Cobalt And Copper Each Of Which Has A Maximum Absorbance At 510 Nm And 645 Nm Respe 1 (96.92 KiB) Viewed 50 times

Ligand X forms a complex with both cobalt and copper, each of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.253 g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 mL aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.532 at 510 nm and 0.389 at 645 nm, when measured with a 1.00 cm cell. The molar absorptivities of the cobalt and copper complexes at each wavelength are shown in the table. Wavelength Molar Absorptivity (€, M-'cm') 2, nm Co Cu 510 37667 5712 645 1283 18110 What is the concentration of cobalt and copper in the final diluted solution? 0.000229 (Co2+] = = M Incorrect -0.0000206 [Cu2+] = M