Ligand X forms a complex with both cobalt and copper, each of which has a maximum...

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Chemistry

Ligand X forms a complex with both cobalt and copper, each ofwhich has a maximum absorbance at 510 nm and 645 nm, respectively.A 0.263-g sample containing cobalt and copper was dissolved anddiluted to a volume of 100.0 mL. A solution containing ligand X wasadded to a 50.0 mL aliquot of the sample solution and diluted to afinal volume of 100.0 mL. The measured absorbance of the unknownsolution was 0.546 at 510 nm and 0.399 at 645 nm, when measuredwith a 1.00-cm cell. The molar absorptivities of the cobalt andcopper complexes at each wavelength are shown in the tablebelow.
What is the concentration of cobalt and copper in the finaldiluted solution?
What is the weight percent of cobalt (FM = 58.933 g/mol) andcopper (FM = 63.546 g/mol) in the 0.263-g sample?

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4.0 Ratings (815 Votes)

You are missing the molar absorptivities of both Cobalt and Copper So instead of skipping this question and leave you with doubts I will give you the main guidelines for you to solve it with your missing data and write me if you still have doubts According to Beers law A EbC We have the two absorbance values at different wavelength but the concentrations of each of the ions is See Answer

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