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Moderate

The Absorbance and Reaction Rate Changes Between Trials

APCHEM-NLXCSY

Two trials of a reaction were run in a lab where absorbance data was collected over time. In Trial 2, the absorbance values for the reaction for each unit of time were higher than they were for Trial 1. Also, the rate of Trial 2 was higher than that of Trial 1.

Which of the following is most likely the case?

A

The concentration of one or more reactants was increased in Trial 2.

B

The concentration of the reactants in Trial 1 was higher than that in Trial 2.

C

The concentration of reactants was decreased for Trial 2.

D

Something interfered with the reaction.