A technician performs the following serial dilution of an unknown dye solution: •…
CHEMISTRY · Subjective · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A technician performs the following serial dilution of an unknown dye solution:
• Step 1 – Pipette 5.00 mL of the unknown into a 100.0 mL volumetric flask and dilute to the mark.
• Step 2 – Pipette 10.0 mL of the first dilution into a 50.0 mL volumetric flask and dilute to the mark.
The final solution gives an absorbance of 0.680 in a 1.00 cm cuvette at a wavelength where the molar absorptivity is 1.70×104Lmol−1cm−1. Determine the molar concentration of the original (unknown) dye solution.