In a calibration experiment a student obtained the relationship for a series of…
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
In a calibration experiment a student obtained the relationship A=(1.25×104)c for a series of solutions measured in a 1.00 cm cuvette. Which of the following is the best interpretation of the numerical value 1.25×104?
(a) It is the concentration (in mol L−1) at which the analyte absorbs 1 \% of the incident light.
(b) It is the molar absorptivity of the analyte, expressed in Lmol−1cm−1, at the chosen wavelength.
(c) It equals twice the path length multiplied by the molar absorptivity of the analyte.
(d) It is the slope of the calibration plot and therefore has units Lmol−1, because the 1.00 cm path length cancels the cm−1 term.