Two kinetics trials are performed at the same temperature with [S2O82-] held constant. The first trial has a reaction time of 84 seconds. For the second trial, the [I-] is four times that of the first trial (the concentration is quadrupled), and the reaction time is 22 seconds.  How long would you expect the reaction to take if the trial used [I ̶ ] equal to one-half of the concentration used in the first trial?

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Two kinetics trials are performed at the same temperature with [S2O82-] held constant. The first trial has a reaction time of 84 seconds. For the second trial, the [I-] is four times that of the first trial (the concentration is quadrupled), and the reaction time is 22 seconds. 

How long would you expect the reaction to take if the trial used [I ̶ ] equal to one-half of the concentration used in the first trial? 

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