\mathrm{Na}_{2} \mathrm{C}_{37} \mathrm{H}_{34} \mathrm{~N}_{2} \mathrm{~S}_{3} \mathrm{O}_{9}+\mathrm{OCl}^{-} \rightarrow \text { products } Blue food coloring can be oxidized by household bleach (which contains OCI-) to form colorless products, as represented by

the equation above. A student used a spectrophotometer set at a wavelength of 635 nm to study the absorbance of the food coloring over time during the bleaching process. In the study, bleach is present in large excess so that the concentration of OCl- is essentially constant throughout the reaction.The students use data from the study to generate the graphs below.