A blank solution containing only the solvent is measured before collecting data for…
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A blank solution containing only the solvent is measured before collecting data for the standards in an absorbance experiment. Which of the following best explains the primary purpose of this step?
(a) To verify that the lamp intensity remains constant over the course of all measurements
(b) To compensate for stray light reaching the detector so that only light from the sample beam is measured
(c) To correct for absorbance originating from the solvent and cuvette so that only the analyte’s absorbance is plotted
(d) To demonstrate that the Beer–Lambert relationship is linear for the chosen concentration range