An analyst must quantify a series of aqueous samples whose concentrations of Dye Y…

CHEMISTRY · Subjective · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

An analyst must quantify a series of aqueous samples whose concentrations of Dye Y vary from 5.0×10−6 M5.0\times10^{-6}\,\text{M} to 3.0×10−4 M3.0\times10^{-4}\,\text{M}. Dye Y has a molar absorptivity of 4.0×103 L mol−1cm−14.0\times10^{3}\,\text{L\,mol}^{-1}\text{cm}^{-1} at the chosen wavelength. The spectrophotometer gives reliable, linear responses only when 0.010≤A≤1.000.010\le A\le1.00. Three quartz cuvettes are available: 0.50 cm, 1.00 cm, and 5.00 cm path lengths. Which cuvette should be selected so that every sample concentration falls within the instrument’s linear absorbance range?

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