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Absorbance Spectrum

APCHEM-VJXEKZ

While testing a sample of copper (II) sulfate at varying wavelengths, you come up with a curve like the one found below. You still need to determine the concentration of the sample.

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Based on this absorption spectrum, at which of the following wavelengths should you run the standards?

A

450 nm

B

550 nm

C

650 nm

D

750 nm