A reference solution of a food-dye exhibits an absorbance of 0.450 when its…

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

A reference solution of a food-dye exhibits an absorbance of 0.450 when its concentration is 2.0×10−4 M2.0\times10^{-4}\,\text{M} in a 1.00 cm cuvette. An unknown solution of the same dye measured under identical conditions shows an absorbance of 0.675. What is the concentration of the unknown solution? (a) 2.67×10−4 M2.67\times10^{-4}\,\text{M} (b) 3.0×10−4 M3.0\times10^{-4}\,\text{M} (c) 6.0×10−4 M6.0\times10^{-4}\,\text{M} (d) 1.33×10−4 M1.33\times10^{-4}\,\text{M}

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