Beer's Law Pathlength and Absorbance
In an experiment based on Beer’s Law, a student posits that a longer pathlength (b) will lead to a lower absorbance (A). What is the flaw in the student’s reasoning?
Overlooked the linear relationship between pathlength and absorbance in Beer’s Law, confusing it with the effect of concentration on absorbance.
Neglected the principle that absorbance increases with both the concentration of the absorbing species and the pathlength of the light through the medium.
Confused the roles of pathlength and concentration in Beer’s Law, failing to recognize that both contribute positively to absorbance.
Misunderstood Beer’s Law, not realizing that an increase in pathlength (b) actually results in higher absorbance (A) due to more light being absorbed.
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