Concept:Spectrometry (or spectrophotometry) is an analytical technique used to measure how much light a chemical substance absorbs by measuring the intensity of light as a beam passes through the sample solution.
Solution:- According to the Beer-Lambert Law, the absorbance of light is directly proportional to the concentration of the absorbing species.
- If a reactant or product uniquely absorbs UV, Visible, or IR light, measuring the continuous change in absorbance provides a highly accurate, non-destructive, and continuous measure of concentration changes over time.
Why other options are incorrect:Chemical methods (like titration) are slow and destructive. Graphical and differential methods are mathematical ways to analyze data, not physical instruments to measure absorbance.
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