Question

Which wavelength is used to generate the calibration curve in the Kinetics experiment?

Answer 1

The absorbance value is used at different course of time of reaction to get an idea of the concentration of the reactants at different point of time. To get the calibration curve we need to know the absorbance maxima of the sample (termed as $\lambda$max).

As the absorbance is maximum here we get enough time for observing the reaction kinetics. As the absorbance goes to nearly zero at the end of the reaction. So $\lambda$max is used for calbration curve or as the standard.