Chemistry

Problem

A laboratory must quantify a series of aqueous samples containing a pigment with a molar absorptivity of

1.0\times10^{4}\,\text{M}^{-1}\,\text{cm}^{-1}

. The concentrations range from

1.0\times10^{-6}\,\text{M}

2.0\times10^{-5}\,\text{M}

. The spectrophotometer provides reliable data only when absorbance is between 0.05 and 1.00. Three cuvettes are available: 0.10 cm, 1.00 cm, and 5.00 cm. Which single cuvette allows every sample in the series to be measured without dilution? a)

0.10\,\text{cm}\ \text{cuvette}

b) None of the three cuvettes meets the requirement c)

5.00\,\text{cm}\ \text{cuvette}

1.00\,\text{cm}\ \text{cuvette}

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