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How to find concentration with a spectrophotometer

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An absorbance of 0.550 is obtained in the determination of copper with a spectrophotometric method. It is known that the solution is contaminated with 1.00*10^-3M of interfering species having molar absorptivity of 150molL/mol.cm Calculate the absorbance due to copper only.

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Solution Summary

How do I interpret data that comes out of a spectrophotometer? Have you forgotten how to answer this question? Does the process confuse you? In this solution we explore how to use the relationship that makes life very easy when working with absorbance values. Don't miss it! It even goes into how to deal with contaminants in your solution!

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We can use the Beer-Lambert relationship for help with this:

A=ebc, ...

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